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GitHub - skx/cpmulator: Golang CP/M emulator for zork, Microsoft BASIC, Turbo Pascal, Wordstar, lighthouse-of-doom, etc
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octicon-link-external HeaderMenu-external-icon color-fg-subtle"> <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path> </svg> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary Link--external" target="_blank" data-analytics-event="{"location":"navbar","action":"blog","context":"product","tag":"link","label":"blog_link_product_navbar"}" href="https://github.blog"> Blog <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle"> <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path> </svg> </a></li> </ul> </div> </div> </div> </li> <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item"> <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false"> Solutions <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1"> <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path> </svg> </button> <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 d-lg-flex flex-wrap dropdown-menu-wide"> <div class="HeaderMenu-column px-lg-4 border-lg-right mb-4 mb-lg-0 pr-lg-7"> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0 pb-lg-3 mb-3 mb-lg-0"> <span class="d-block h4 color-fg-default my-1" id="solutions-by-company-size-heading">By company size</span> <ul class="list-style-none f5" aria-labelledby="solutions-by-company-size-heading"> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"enterprises","context":"solutions","tag":"link","label":"enterprises_link_solutions_navbar"}" href="https://github.com/enterprise"> Enterprises </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"small_and_medium_teams","context":"solutions","tag":"link","label":"small_and_medium_teams_link_solutions_navbar"}" href="https://github.com/team"> Small and medium teams </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"startups","context":"solutions","tag":"link","label":"startups_link_solutions_navbar"}" href="https://github.com/enterprise/startups"> Startups </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"nonprofits","context":"solutions","tag":"link","label":"nonprofits_link_solutions_navbar"}" href="/solutions/industry/nonprofits"> Nonprofits </a></li> </ul> </div> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0"> <span class="d-block h4 color-fg-default my-1" id="solutions-by-use-case-heading">By use case</span> <ul class="list-style-none f5" aria-labelledby="solutions-by-use-case-heading"> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"devsecops","context":"solutions","tag":"link","label":"devsecops_link_solutions_navbar"}" href="/solutions/use-case/devsecops"> DevSecOps </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"devops","context":"solutions","tag":"link","label":"devops_link_solutions_navbar"}" href="/solutions/use-case/devops"> DevOps </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"ci_cd","context":"solutions","tag":"link","label":"ci_cd_link_solutions_navbar"}" href="/solutions/use-case/ci-cd"> CI/CD </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"view_all_use_cases","context":"solutions","tag":"link","label":"view_all_use_cases_link_solutions_navbar"}" href="/solutions/use-case"> View all use cases </a></li> </ul> </div> </div> <div class="HeaderMenu-column px-lg-4"> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0"> <span class="d-block h4 color-fg-default my-1" id="solutions-by-industry-heading">By industry</span> <ul class="list-style-none f5" aria-labelledby="solutions-by-industry-heading"> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"healthcare","context":"solutions","tag":"link","label":"healthcare_link_solutions_navbar"}" href="/solutions/industry/healthcare"> Healthcare </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"financial_services","context":"solutions","tag":"link","label":"financial_services_link_solutions_navbar"}" href="/solutions/industry/financial-services"> Financial services </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"manufacturing","context":"solutions","tag":"link","label":"manufacturing_link_solutions_navbar"}" href="/solutions/industry/manufacturing"> Manufacturing </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"government","context":"solutions","tag":"link","label":"government_link_solutions_navbar"}" href="/solutions/industry/government"> Government </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"view_all_industries","context":"solutions","tag":"link","label":"view_all_industries_link_solutions_navbar"}" href="/solutions/industry"> View all industries </a></li> </ul> </div> </div> <div class="HeaderMenu-trailing-link rounded-bottom-2 flex-shrink-0 mt-lg-4 px-lg-4 py-4 py-lg-3 f5 text-semibold"> <a href="/solutions"> View all solutions <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-right HeaderMenu-trailing-link-icon"> <path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 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d-lg-flex flex-wrap dropdown-menu-wide"> <div class="HeaderMenu-column px-lg-4 border-lg-right mb-4 mb-lg-0 pr-lg-7"> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0"> <span class="d-block h4 color-fg-default my-1" id="resources-topics-heading">Topics</span> <ul class="list-style-none f5" aria-labelledby="resources-topics-heading"> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"ai","context":"resources","tag":"link","label":"ai_link_resources_navbar"}" href="/resources/articles/ai"> AI </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"devops","context":"resources","tag":"link","label":"devops_link_resources_navbar"}" href="/resources/articles/devops"> DevOps </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"security","context":"resources","tag":"link","label":"security_link_resources_navbar"}" href="/resources/articles/security"> Security </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"software_development","context":"resources","tag":"link","label":"software_development_link_resources_navbar"}" href="/resources/articles/software-development"> Software Development </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"view_all","context":"resources","tag":"link","label":"view_all_link_resources_navbar"}" href="/resources/articles"> View all </a></li> </ul> </div> </div> <div class="HeaderMenu-column px-lg-4"> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0 border-bottom-0"> <span class="d-block h4 color-fg-default my-1" id="resources-explore-heading">Explore</span> <ul class="list-style-none f5" aria-labelledby="resources-explore-heading"> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary Link--external" target="_blank" data-analytics-event="{"location":"navbar","action":"learning_pathways","context":"resources","tag":"link","label":"learning_pathways_link_resources_navbar"}" href="https://resources.github.com/learn/pathways"> Learning Pathways <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle"> <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path> </svg> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary Link--external" target="_blank" data-analytics-event="{"location":"navbar","action":"events_amp_webinars","context":"resources","tag":"link","label":"events_amp_webinars_link_resources_navbar"}" href="https://resources.github.com"> Events & Webinars <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle"> <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path> </svg> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"ebooks_amp_whitepapers","context":"resources","tag":"link","label":"ebooks_amp_whitepapers_link_resources_navbar"}" href="https://github.com/resources/whitepapers"> Ebooks & Whitepapers </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"customer_stories","context":"resources","tag":"link","label":"customer_stories_link_resources_navbar"}" href="https://github.com/customer-stories"> Customer Stories </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary Link--external" target="_blank" data-analytics-event="{"location":"navbar","action":"partners","context":"resources","tag":"link","label":"partners_link_resources_navbar"}" href="https://partner.github.com"> Partners <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle"> <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path> </svg> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"executive_insights","context":"resources","tag":"link","label":"executive_insights_link_resources_navbar"}" href="https://github.com/solutions/executive-insights"> Executive Insights </a></li> </ul> </div> </div> </div> </li> <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item"> <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false"> Open Source <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1"> <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path> </svg> </button> <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 pb-2 pb-lg-4 px-lg-4"> <div class="HeaderMenu-column"> <div class="border-bottom pb-3 pb-lg-0 pb-lg-3 mb-3 mb-lg-0 mb-lg-3"> <ul class="list-style-none f5" > <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description" data-analytics-event="{"location":"navbar","action":"github_sponsors","context":"open_source","tag":"link","label":"github_sponsors_link_open_source_navbar"}" href="/sponsors"> <div> <div class="color-fg-default h4">GitHub Sponsors</div> Fund open source developers </div> </a></li> </ul> </div> <div class="border-bottom pb-3 pb-lg-0 pb-lg-3 mb-3 mb-lg-0 mb-lg-3"> <ul class="list-style-none f5" > <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description" data-analytics-event="{"location":"navbar","action":"the_readme_project","context":"open_source","tag":"link","label":"the_readme_project_link_open_source_navbar"}" href="https://github.com/readme"> <div> <div class="color-fg-default h4">The ReadME Project</div> GitHub community articles </div> </a></li> </ul> </div> <div class="border-bottom pb-3 pb-lg-0 border-bottom-0"> <span class="d-block h4 color-fg-default my-1" id="open-source-repositories-heading">Repositories</span> <ul class="list-style-none f5" aria-labelledby="open-source-repositories-heading"> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"topics","context":"open_source","tag":"link","label":"topics_link_open_source_navbar"}" href="https://github.com/topics"> Topics </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" 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data-target="custom-scopes.createCustomScopeForm"> <!-- '"` --><!-- </textarea></xmp> --></option></form><form id="custom-scopes-dialog-form" data-turbo="false" action="/search/custom_scopes" accept-charset="UTF-8" method="post"><input type="hidden" data-csrf="true" name="authenticity_token" value="LRMrLo2h1ImHcdBvtgT269BnwO7igAnZhznkCz77FIT5QU6YpVI4eVzRw3IJkadVpBt5ThrrdpgfxwF7CRTJTQ==" /> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <input type="hidden" id="custom_scope_id" name="custom_scope_id" data-target="custom-scopes.customScopesIdField"> <div class="form-group"> <label for="custom_scope_name">Name</label> <auto-check src="/search/custom_scopes/check_name" required only-validate-on-blur="false"> <input type="text" name="custom_scope_name" id="custom_scope_name" data-target="custom-scopes.customScopesNameField" class="form-control" autocomplete="off" placeholder="github-ruby" required maxlength="50"> <input type="hidden" data-csrf="true" value="vHOddLJW2NdK5NDHzzf5M8sGeCadws9oZ1h1fFUENvcSiCX7bPFiGJVYcqXToTPfvlOB13CJzEapD0DhdfaGwQ==" /> </auto-check> </div> <div class="form-group"> <label for="custom_scope_query">Query</label> <input type="text" name="custom_scope_query" id="custom_scope_query" data-target="custom-scopes.customScopesQueryField" class="form-control" autocomplete="off" placeholder="(repo:mona/a OR repo:mona/b) AND lang:python" required maxlength="500"> </div> <p class="text-small color-fg-muted"> To see all available qualifiers, see our <a class="Link--inTextBlock" href="https://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax">documentation</a>. </p> </form> </div> <div data-target="custom-scopes.manageCustomScopesForm"> <div data-target="custom-scopes.list"></div> </div> </div> </scrollable-region> <div data-view-component="true" class="Overlay-footer Overlay-footer--alignEnd Overlay-footer--divided"> <button data-action="click:custom-scopes#customScopesCancel" type="button" data-view-component="true" class="btn"> Cancel </button> <button form="custom-scopes-dialog-form" data-action="click:custom-scopes#customScopesSubmit" data-target="custom-scopes.customScopesSubmitButton" type="submit" data-view-component="true" class="btn-primary btn"> Create saved search </button> </div> </dialog></dialog-helper> </custom-scopes> </div> </qbsearch-input> <div class="position-relative HeaderMenu-link-wrap d-lg-inline-block"> <a href="/login?return_to=https%3A%2F%2Fgithub.com%2Fskx%2Fcpmulator" class="HeaderMenu-link HeaderMenu-link--sign-in HeaderMenu-button flex-shrink-0 no-underline d-none d-lg-inline-flex border border-lg-0 rounded rounded-lg-0 px-2 py-1" style="margin-left: 12px;" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"site header menu","repository_id":null,"auth_type":"SIGN_UP","originating_url":"https://github.com/skx/cpmulator","user_id":null}}" data-hydro-click-hmac="0fec6557697100b30bd68cf710bc0ebb91bae6d073bb423f119e9dcd8427fd8f" data-analytics-event="{"category":"Marketing nav","action":"click to go to homepage","label":"ref_page:Marketing;ref_cta:Sign in;ref_loc:Header"}" > Sign in </a> </div> <a href="/signup?ref_cta=Sign+up&ref_loc=header+logged+out&ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E&source=header-repo&source_repo=skx%2Fcpmulator" class="HeaderMenu-link HeaderMenu-link--sign-up HeaderMenu-button flex-shrink-0 d-flex d-lg-inline-flex no-underline border color-border-default rounded px-2 py-1" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"site header menu","repository_id":null,"auth_type":"SIGN_UP","originating_url":"https://github.com/skx/cpmulator","user_id":null}}" data-hydro-click-hmac="0fec6557697100b30bd68cf710bc0ebb91bae6d073bb423f119e9dcd8427fd8f" data-analytics-event="{"category":"Sign up","action":"click to sign up for 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data-view-component="true" class="octicon octicon-repo color-fg-muted mr-2"> <path d="M2 2.5A2.5 2.5 0 0 1 4.5 0h8.75a.75.75 0 0 1 .75.75v12.5a.75.75 0 0 1-.75.75h-2.5a.75.75 0 0 1 0-1.5h1.75v-2h-8a1 1 0 0 0-.714 1.7.75.75 0 1 1-1.072 1.05A2.495 2.495 0 0 1 2 11.5Zm10.5-1h-8a1 1 0 0 0-1 1v6.708A2.486 2.486 0 0 1 4.5 9h8ZM5 12.25a.25.25 0 0 1 .25-.25h3.5a.25.25 0 0 1 .25.25v3.25a.25.25 0 0 1-.4.2l-1.45-1.087a.249.249 0 0 0-.3 0L5.4 15.7a.25.25 0 0 1-.4-.2Z"></path> </svg> <span class="author flex-self-stretch" itemprop="author"> <a class="url fn" rel="author" data-hovercard-type="user" data-hovercard-url="/users/skx/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="/skx"> skx </a> </span> <span class="mx-1 flex-self-stretch color-fg-muted">/</span> <strong itemprop="name" class="mr-2 flex-self-stretch"> <a data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/skx/cpmulator">cpmulator</a> </strong> <span></span><span class="Label Label--secondary v-align-middle mr-1">Public</span> </div> </div> <div id="repository-details-container" class="flex-shrink-0" data-turbo-replace style="max-width: 70%;"> <ul class="pagehead-actions flex-shrink-0 d-none d-md-inline" style="padding: 2px 0;"> <li> <a href="/login?return_to=%2Fskx%2Fcpmulator" rel="nofollow" id="repository-details-watch-button" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"notification subscription menu watch","repository_id":null,"auth_type":"LOG_IN","originating_url":"https://github.com/skx/cpmulator","user_id":null}}" data-hydro-click-hmac="c65f9557fb189bc85564dba3f75175778f275294c2b5bd168413e5d2f9bcba36" aria-label="You must be signed in to change notification settings" data-view-component="true" class="btn-sm btn"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-bell mr-2"> <path d="M8 16a2 2 0 0 0 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data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"repo details fork button","repository_id":784388354,"auth_type":"LOG_IN","originating_url":"https://github.com/skx/cpmulator","user_id":null}}" data-hydro-click-hmac="d3e967fece78dc778182f3a10c00bb0103da7d277fa88e5626c98207061f5b03" data-view-component="true" class="btn-sm btn"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked mr-2"> <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path> </svg>Fork <span id="repo-network-counter" data-pjax-replace="true" data-turbo-replace="true" title="4" 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0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"></path> </svg><span data-view-component="true" class="d-inline"> Star </span> <span id="repo-stars-counter-star" aria-label="111 users starred this repository" data-singular-suffix="user starred this repository" data-plural-suffix="users starred this repository" data-turbo-replace="true" title="111" data-view-component="true" class="Counter js-social-count">111</span> </a></div> </li> </ul> </div> </div> <div id="responsive-meta-container" data-turbo-replace> <div class="d-block d-md-none mb-2 px-3 px-md-4 px-lg-5"> <p class="f4 mb-3 "> Golang CP/M emulator for zork, Microsoft BASIC, Turbo Pascal, Wordstar, lighthouse-of-doom, etc </p> <h3 class="sr-only">License</h3> <div class="mb-2"> <a href="/skx/cpmulator/blob/master/LICENSE" class="Link--muted" data-analytics-event="{"category":"Repository Overview","action":"click","label":"location:sidebar;file:license"}" > <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-law mr-2"> <path d="M8.75.75V2h.985c.304 0 .603.08.867.231l1.29.736c.038.022.08.033.124.033h2.234a.75.75 0 0 1 0 1.5h-.427l2.111 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.006.005-.01.01-.045.04c-.21.176-.441.327-.686.45C14.556 10.78 13.88 11 13 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L12.178 4.5h-.162c-.305 0-.604-.079-.868-.231l-1.29-.736a.245.245 0 0 0-.124-.033H8.75V13h2.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1 0-1.5h2.5V3.5h-.984a.245.245 0 0 0-.124.033l-1.289.737c-.265.15-.564.23-.869.23h-.162l2.112 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.016.015-.045.04c-.21.176-.441.327-.686.45C4.556 10.78 3.88 11 3 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L2.178 4.5H1.75a.75.75 0 0 1 0-1.5h2.234a.249.249 0 0 0 .125-.033l1.288-.737c.265-.15.564-.23.869-.23h.984V.75a.75.75 0 0 1 1.5 0Zm2.945 8.477c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327Zm-10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 6.327Z"></path> </svg> MIT license </a> </div> <div class="mb-3"> <a class="Link--secondary no-underline mr-3" href="/skx/cpmulator/stargazers"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star mr-1"> <path d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"></path> </svg> <span class="text-bold">111</span> stars </a> <a class="Link--secondary no-underline mr-3" href="/skx/cpmulator/forks"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked mr-1"> <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path> </svg> <span class="text-bold">4</span> forks </a> <a 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written in golang\u003c/h1\u003e\u003ca id=\"user-content-cpmulator---a-cpm-emulator-written-in-golang\" class=\"anchor\" aria-label=\"Permalink: cpmulator - A CP/M emulator written in golang\" href=\"#cpmulator---a-cpm-emulator-written-in-golang\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThis repository contains a CP/M emulator, with integrated CCP (\"Console Command Processor\", i.e. shell), which is designed to run CP/M binaries. The project was initially created to run \u003ca href=\"https://github.com/skx/lighthouse-of-doom/\"\u003ea text-based adventure game\u003c/a\u003e which I wrote a few years ago. (That game was written in Z80 assembly language targeting CP/M, later it was ported to the ZX Spectrum.)\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eOver time this project has become more complete, and I've now implemented enough functionity to run many of the well-known CP/M programs:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eThe Aztec C-Compiler.\u003c/li\u003e\n\u003cli\u003eBorland's Turbo Pascal.\u003c/li\u003e\n\u003cli\u003eMany early Infocom games:\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eZork 1, 2, \u0026amp; 3.\u003c/li\u003e\n\u003cli\u003ePlanetfall.\u003c/li\u003e\n\u003cli\u003eetc.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003eBBC and Microsoft BASIC.\u003c/li\u003e\n\u003cli\u003eWordstar.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eAs things stand this project is \"complete\". I'd like to increase the test-coverage for my own reassurance, but I've now reached a point where all the binaries I've tried to execute work as expected. If you find a program that \u003cem\u003edoesn't\u003c/em\u003e work please \u003ca href=\"https://github.com/skx/cpmulator/issues\"\u003eopen an issue\u003c/a\u003e, otherwise I suspect ongoing development will be minimal, and sporadic.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNOTE\u003c/strong\u003e I've not implemented any notion of disk-support. This means that opening, reading/writing, and closing files is absolutely fine, but any API call that refers to tracks, sectors, or disks will fail (with an \"unimplemented syscall\" error).\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003eA companion repository contains a collection of vintage CP/M software you can use with this, or any other, CP/M emulator:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/skx/cpm-dist\"\u003ehttps://github.com/skx/cpm-dist\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eInstallation \u0026amp; Versioning\u003c/h1\u003e\u003ca id=\"user-content-installation--versioning\" class=\"anchor\" aria-label=\"Permalink: Installation \u0026amp; Versioning\" href=\"#installation--versioning\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThis emulator is written using golang, so if you have a working golang toolchain you can install in the standard way:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"go install github.com/skx/cpmulator@latest\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003ego install github.com/skx/cpmulator@latest\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIf you were to clone this repository to your local system you could build, and install it, by running:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"go build .\ngo install .\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003ego build .\ngo install .\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIf neither of these options are suitable you may download a binary from \u003ca href=\"https://github.com/skx/cpmulator/releases\"\u003eour release page\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eReleases will be made as/when features seem to justify it, but it should be noted that I consider the CLI tool, and the emulator itself, the \"product\". That means that the internal APIs will change around as/when necessary - so far changes have been minor, but I'm not averse to changing parameters to internal packages, or adding/renaming/removing methods as necessary without any regard for external users.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eQuick Start\u003c/h1\u003e\u003ca id=\"user-content-quick-start\" class=\"anchor\" aria-label=\"Permalink: Quick Start\" href=\"#quick-start\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eDocker-based Quick Start\u003c/h2\u003e\u003ca id=\"user-content-docker-based-quick-start\" class=\"anchor\" aria-label=\"Permalink: Docker-based Quick Start\" href=\"#docker-based-quick-start\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIf you've got docker installed you can launch things by running:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"docker run --pull=always -t -i ghcr.io/skx/cpmulator:master\"\u003e\u003cpre\u003edocker run --pull=always -t -i ghcr.io/skx/cpmulator:master\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNOTE\u003c/strong\u003e You must run with the \u003ccode\u003e-t\u003c/code\u003e and \u003ccode\u003e-i\u003c/code\u003e flags, otherwise the console will be broken.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eOnce launched you can explore, for example to run Zork type:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eG:\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eThis will change to the G:-drive, which is where I've placed games.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eZORK1\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eThis will launch the Zork1 binary.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eLocal Quick Start\u003c/h2\u003e\u003ca id=\"user-content-local-quick-start\" class=\"anchor\" aria-label=\"Permalink: Local Quick Start\" href=\"#local-quick-start\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eBuild/Install this application.\u003c/li\u003e\n\u003cli\u003eClone the associated repository of binaries:\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003egit clone https://github.com/skx/cpm-dist.git /tmp/cpm-dist\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003eLaunch the emulator, pointing at the binaries:\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ecpmulator -cd /tmp/cpm-dist -directories\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003eStart something:\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\"B:\", then \"MBASIC\" - to run BASIC. (Type \"SYSTEM\" to exit.)\u003c/li\u003e\n\u003cli\u003e\"G:\", then \"ZORK1\" - to play zork1.\u003c/li\u003e\n\u003cli\u003e\"P:\", then \"TURBO\" - to run turbo pascal.\u003c/li\u003e\n\u003cli\u003e\"E:\", then \"WS\" - to run wordstar.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eUsage\u003c/h1\u003e\u003ca id=\"user-content-usage\" class=\"anchor\" aria-label=\"Permalink: Usage\" href=\"#usage\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIf you launch \u003ccode\u003ecpmulator\u003c/code\u003e with no arguments then the default CCP will be launched, dropping you into a shell:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"$ cpmulator\nA\u0026gt;dir\n\nA: LICENSE . | README .MD | CPMULATO. | GO .MOD\nA: GO .SUM | MAIN .GO | RET .COM\n\nA\u0026gt;TYPE LICENSE\nThe MIT License (MIT)\n..\nA\u0026gt;\"\u003e\u003cpre\u003e$ cpmulator\nA\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003edir\n\nA: LICENSE \u003cspan class=\"pl-c1\"\u003e.\u003c/span\u003e \u003cspan class=\"pl-k\"\u003e|\u003c/span\u003e README .MD \u003cspan class=\"pl-k\"\u003e|\u003c/span\u003e CPMULATO. \u003cspan class=\"pl-k\"\u003e|\u003c/span\u003e GO .MOD\nA: GO .SUM \u003cspan class=\"pl-k\"\u003e|\u003c/span\u003e MAIN .GO \u003cspan class=\"pl-k\"\u003e|\u003c/span\u003e RET .COM\n\nA\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003eTYPE LICENSE\nThe MIT License (MIT)\n..\nA\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eYou can terminate the CCP by typing \u003ccode\u003eEXIT\u003c/code\u003e. The following built-in commands are available:\u003c/p\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShow the standard built-in commands of the default CCP:\u003c/summary\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eCLS\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eClear the screen.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eDIR\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eTry \"\u003ccode\u003eDIR *.COM\u003c/code\u003e\" if you want to see only executables, for example.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eEXIT\u003c/code\u003e / \u003ccode\u003eHALT\u003c/code\u003e / \u003ccode\u003eQUIT\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eTerminate the CCP.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eERA\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eErase the named files, wildcards are permitted.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eTYPE\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eView the contents of the named file - wildcards are not permitted.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eREN\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eRename files, so \"\u003ccode\u003eREN NEW=OLD\u003c/code\u003e\" - again note that wildcards are not permitted, nor is cross-drive renaming.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/details\u003e\n\u003cp dir=\"auto\"\u003eThere are a pair of CCP implementations included within the emulator, and they can be selected via the \u003ccode\u003e-ccp\u003c/code\u003e command-line flag:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\"ccp\"\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eThe original CCP from Digital Research.\u003c/li\u003e\n\u003cli\u003eLaunch the emulator via \u003ccode\u003ecpmulator -ccp=ccp ..\u003c/code\u003e, or use \u003ccode\u003eA:!CCP CCP\u003c/code\u003e to change to it at run-time.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\"ccpz\"\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eAn enhanced CCP, which is the default\u003c/li\u003e\n\u003cli\u003e\"\u003ccode\u003eGET 0100 FOO.COM\u003c/code\u003e\" will load a binary into RAM, at address 0x100. Then \"\u003ccode\u003eJMP 0100\u003c/code\u003e\" will launch it.\u003c/li\u003e\n\u003cli\u003eThere are also built-in \u003ccode\u003ePEEK\u003c/code\u003e and \u003ccode\u003ePOKE\u003c/code\u003e commands which can show/set memory contents.\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eLIST file.ext\u003c/code\u003e will \"print\" the contents of \u003ccode\u003efile.ext\u003c/code\u003e, but see the note later about printer-output (TLDR; We write it to \u003ccode\u003eprint.log\u003c/code\u003e.)\u003c/li\u003e\n\u003cli\u003eThe prompt will show the currently-selected user-number, for example if you run \"USER 3\".\u003c/li\u003e\n\u003cli\u003eIf a command isn't found in the current drive A: will be searched instead, which is handy.\u003c/li\u003e\n\u003cli\u003eFinally any line beginning with the comment-character (\u003ccode\u003e#\u003c/code\u003e) will be ignored, which is useful for commenting purposes inside SUBMIT files.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eYou can also launch a binary directly by specifying it's path upon the command-line, followed by any optional arguments that the binary accepts or requires:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ cpmulator /path/to/binary [optional-args]\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ cpmulator /path/to/binary [optional-args]\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCommand Line Flags\u003c/h2\u003e\u003ca id=\"user-content-command-line-flags\" class=\"anchor\" aria-label=\"Permalink: Command Line Flags\" href=\"#command-line-flags\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThere are many available command-line options, which are shown in the output of \u003ccode\u003ecpmulator -help\u003c/code\u003e, but the following summary shows the most important/useful options:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003e-cd /path/to/directory\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eChange to the given directory before running.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e-directories\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eUse directories on the host for drive-contents, discussed later in this document.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e-embed\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eEnable/Disable the embedded binaries we unconditionally add to the A:-drive. (The utilities to change the output driver, toggle debugging, etc.)\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e-log-path /path/to/file\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eOutput debug-logs to the given file, creating it if necessary.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eNOTE\u003c/strong\u003e: You can run \u003ccode\u003eA:!DEBUG 1\u003c/code\u003e to enable \"quick debug logging\", and \u003ccode\u003eA:!DEBUG 0\u003c/code\u003e to turn it back off again, at runtime.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e-prn-path /path/to/file\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eAll output which CP/M sends to the \"printer\" will be written to the given file.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e-list-syscalls\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eDump the list of implemented BDOS and BIOS syscalls.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e-list-input-drivers\u003c/code\u003e and \u003ccode\u003e-list-output-drivers\u003c/code\u003e to see the available I/O driver-names, which may then be selected via the \u003ccode\u003e-input\u003c/code\u003e and \u003ccode\u003e-output\u003c/code\u003e flags.\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003e-version\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eShow the version number of the emulator, and exit.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eStartup Processing\u003c/h2\u003e\u003ca id=\"user-content-startup-processing\" class=\"anchor\" aria-label=\"Permalink: Startup Processing\" href=\"#startup-processing\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWhen the CCP is launched for interactive execution, we allow commands to be executed at startup:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eIf \u003ccode\u003eSUBMIT.COM\u003c/code\u003e \u003cstrong\u003eand\u003c/strong\u003e \u003ccode\u003eAUTOEXEC.SUB\u003c/code\u003e exist on A:\u003c/li\u003e\n\u003cli\u003eThen the contents of \u003ccode\u003eAUTOEXEC.SUB\u003c/code\u003e will be executed.\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eWe secretly run \"\u003ccode\u003eSUBMIT AUTOEXEC\u003c/code\u003e\" to achieve this.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eThis allows you to customize the emulator, or perform other \"one-time\" setup via the options described in the next section.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eRuntime Behaviour Changes\u003c/h2\u003e\u003ca id=\"user-content-runtime-behaviour-changes\" class=\"anchor\" aria-label=\"Permalink: Runtime Behaviour Changes\" href=\"#runtime-behaviour-changes\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThere are a small number of \u003ca href=\"/skx/cpmulator/blob/master/EXTENSIONS.md\"\u003eextensions\u003c/a\u003e added to the BIOS functionality we provide, and these extensions allow changing some aspects of the emulator at runtime.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe behaviour changing is achieved by having a small number of .COM files invoke the extension functions, and these binaries are embedded within our emulator to improve ease of use, via the \u003ca href=\"/skx/cpmulator/blob/master/static\"\u003estatic/\u003c/a\u003e directory in our source-tree. This means no matter what you'll always find some binaries installed on A:, despite not being present in reality - you can disable the appearance of these binaries via the \u003ccode\u003e-embed=false\u003c/code\u003e command-line flag.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNOTE\u003c/strong\u003e To avoid naming collisions all our embedded binaries are named with a \u003ccode\u003e!\u003c/code\u003e prefix, except for \u003ccode\u003e#.COM\u003c/code\u003e which is designed to be used as a comment-binary.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCCP Handling\u003c/h3\u003e\u003ca id=\"user-content-ccp-handling\" class=\"anchor\" aria-label=\"Permalink: CCP Handling\" href=\"#ccp-handling\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWe default to loading the enhanced CCP, but allow the original from Digital Research to be used via the \u003ccode\u003e-ccp\u003c/code\u003e command-line flag. The binary \u003ccode\u003eA:!CCP.COM\u003c/code\u003e lets you change CCP at runtime.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCtrl-C Handling\u003c/h3\u003e\u003ca id=\"user-content-ctrl-c-handling\" class=\"anchor\" aria-label=\"Permalink: Ctrl-C Handling\" href=\"#ctrl-c-handling\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eTraditionally pressing \u003ccode\u003eCtrl-C\u003c/code\u003e would reload the CCP, via a soft boot. I think that combination is likely to be entered by accident, so in \u003ccode\u003ecpmulator\u003c/code\u003e we default to requiring you to press Ctrl-C \u003cem\u003etwice\u003c/em\u003e in a row to reboot the CCP.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe binary \u003ccode\u003eA:!CTRLC.COM\u003c/code\u003e which lets you change this at runtime. Run \u003ccode\u003eA:!CTRLC 0\u003c/code\u003e to disable the Ctrl-C behaviour, or \u003ccode\u003eA:!CTRLC N\u003c/code\u003e to require N consecutive Ctrl-C keystrokes to trigger the restart-behaviour (max: 9).\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eConsole Input\u003c/h3\u003e\u003ca id=\"user-content-console-input\" class=\"anchor\" aria-label=\"Permalink: Console Input\" href=\"#console-input\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWe default to using the portable \u003ccode\u003etermbox-go\u003c/code\u003e-based input-handler, this can be changed via the \u003ccode\u003e-input\u003c/code\u003e command-line flag at startup. Additionally it can be changed at runtime via \u003ccode\u003eA:!INPUT.COM\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eRun \u003ccode\u003eA:!INPUT stty\u003c/code\u003e to use the non-portable Unix-centric approach which provides a scrollback, and uses the system's \u003ccode\u003estty\u003c/code\u003e binary to enable/disable character echoing.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eConsole Output\u003c/h3\u003e\u003ca id=\"user-content-console-output\" class=\"anchor\" aria-label=\"Permalink: Console Output\" href=\"#console-output\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWe default to pretending our output device is an ADM-3A terminal, this can be changed via the \u003ccode\u003e-output\u003c/code\u003e command-line flag at startup. Additionally it can be changed at runtime via \u003ccode\u003eA:!OUTPUT.COM\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eRun \u003ccode\u003eA:!OUTPUT ansi\u003c/code\u003e to disable the output emulation, or \u003ccode\u003eA:!OUTPUT adm-3a\u003c/code\u003e to restore it.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eYou'll see that the \u003ca href=\"https://github.com/skx/cpm-dist\"\u003ecpm-dist\u003c/a\u003e repository contains a version of Wordstar, and that behaves differently depending on the selected output handler. Changing the handler at run-time is a neat bit of behaviour.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eDebug Handling\u003c/h3\u003e\u003ca id=\"user-content-debug-handling\" class=\"anchor\" aria-label=\"Permalink: Debug Handling\" href=\"#debug-handling\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWe expect that all \u003cem\u003ereal\u003c/em\u003e debugging will involve the comprehensive logfile which is created via the \u003ccode\u003e-log-path\u003c/code\u003e argument to the emulator, however we\nhave a \"quick debug\" option which will merely log the syscalls which are invoked, and this has the advantage that it can be enabled, or disabled, at\nruntime.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003eA:!DEBUG.COM\u003c/code\u003e will show the state of the flag, and it can be enabled with \u003ccode\u003eA:!DEBUG 1\u003c/code\u003e or disabled with \u003ccode\u003e!DEBUG 0\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFinally \u003ccode\u003eA:!VERSION.COM\u003c/code\u003e will show you the version of the emulator you're running.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eDrives vs. Directories\u003c/h1\u003e\u003ca id=\"user-content-drives-vs-directories\" class=\"anchor\" aria-label=\"Permalink: Drives vs. Directories\" href=\"#drives-vs-directories\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eBy default when you launch \u003ccode\u003ecpmulator\u003c/code\u003e with no arguments you'll be presented with the CCP interface, with A: as the current drive. In this mode A:, B:, C:, and all other drives, will refer to the current-working directory from which you launched the emulator. This is perhaps the most practical way to get started, but it means that files are repeated across drives:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003ei.e. \"\u003ccode\u003eA:FOO\u003c/code\u003e\" is the same as \"\u003ccode\u003eB:FOO\u003c/code\u003e\", and if you delete \"\u003ccode\u003eC:FOO\u003c/code\u003e\" you'll find it has vanished from all drives.\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eIn short \"\u003ccode\u003eFOO\u003c/code\u003e\" will exist on drives \u003ccode\u003eA:\u003c/code\u003e all the way through to \u003ccode\u003eP:\u003c/code\u003e.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eIf you prefer you may configure drives to be distinct, each drive referring to a distinct sub-directory upon the host system (i.e. the machine you're running on):\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"$ mkdir A/ ; touch A/LS.COM ; touch A/FOO.COM\n$ mkdir B/ ; touch B/DU.COM ; touch B/BAR.COM\n$ mkdir G/ ; touch G/ME.COM ; touch G/BAZ.COM\"\u003e\u003cpre\u003e$ mkdir A/ \u003cspan class=\"pl-k\"\u003e;\u003c/span\u003e touch A/LS.COM \u003cspan class=\"pl-k\"\u003e;\u003c/span\u003e touch A/FOO.COM\n$ mkdir B/ \u003cspan class=\"pl-k\"\u003e;\u003c/span\u003e touch B/DU.COM \u003cspan class=\"pl-k\"\u003e;\u003c/span\u003e touch B/BAR.COM\n$ mkdir G/ \u003cspan class=\"pl-k\"\u003e;\u003c/span\u003e touch G/ME.COM \u003cspan class=\"pl-k\"\u003e;\u003c/span\u003e touch G/BAZ.COM\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eNow if you launch the emulator you'll see only the files which \u003cem\u003eshould\u003c/em\u003e be visible on the appropriate drive:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"$ cpmulator -directories\nA\u0026gt;DIR A:\nA: FOO .COM | LS .COM\n\nA\u0026gt;DIR B:\nB: BAR .COM | DU .COM\n\nA\u0026gt;DIR G:\nG: BAZ .COM | ME .COM\n\nA\u0026gt;DIR E:\nNo file\"\u003e\u003cpre\u003e$ cpmulator -directories\nA\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003eDIR A:\nA: FOO .COM \u003cspan class=\"pl-k\"\u003e|\u003c/span\u003e LS .COM\n\nA\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003eDIR B:\nB: BAR .COM \u003cspan class=\"pl-k\"\u003e|\u003c/span\u003e DU .COM\n\nA\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003eDIR G:\nG: BAZ .COM \u003cspan class=\"pl-k\"\u003e|\u003c/span\u003e ME .COM\n\nA\u003cspan class=\"pl-k\"\u003e\u0026gt;\u003c/span\u003eDIR E:\nNo file\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eA companion repository contains a larger collection of vintage CP/M software you can use with this emulator:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/skx/cpm-dist\"\u003ehttps://github.com/skx/cpm-dist\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eThis is arranged into subdirectories, on the assumption you'll run with the \u003ccode\u003e-directories\u003c/code\u003e flag, and the drives are thus used as a means of organization. For example you might want to look at games, on the \u003ccode\u003eG:\u003c/code\u003e drive, or the BASIC interpreters on the \u003ccode\u003eB:\u003c/code\u003e drive:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"frodo ~/Repos/github.com/skx/cpm-dist $ cpmulator -directories\nA\u0026gt;g:\nG\u0026gt;dir *.com\nG: HITCH .COM | LEATHER .COM | LIHOUSE .COM | PLANET .COM\nG: ZORK1 .COM | ZORK2 .COM | ZORK3 .COM\n\nG\u0026gt;dir b:*.com\nB: MBASIC .COM | OBASIC .COM | TBASIC .COM\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003efrodo ~/Repos/github.com/skx/cpm-dist $ cpmulator -directories\nA\u0026gt;g:\nG\u0026gt;dir *.com\nG: HITCH .COM | LEATHER .COM | LIHOUSE .COM | PLANET .COM\nG: ZORK1 .COM | ZORK2 .COM | ZORK3 .COM\n\nG\u0026gt;dir b:*.com\nB: MBASIC .COM | OBASIC .COM | TBASIC .COM\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eYou can also point specific drives to particular paths via the \u003ccode\u003e-drive-X\u003c/code\u003e command-line arguments. For example the following would have A: and B: pointed to custom paths, and C:-P: using the current working directory:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ cpmulator -ccp=ccpz -drive-a /tmp -drive-b ~/Repos/github.com/skx/cpm-dist/G/\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ cpmulator -ccp=ccpz -drive-a /tmp -drive-b ~/Repos/github.com/skx/cpm-dist/G/\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eImplemented Syscalls\u003c/h1\u003e\u003ca id=\"user-content-implemented-syscalls\" class=\"anchor\" aria-label=\"Permalink: Implemented Syscalls\" href=\"#implemented-syscalls\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eYou can see the list of implemented syscalls, along with a mention of how complete their implementation is, by running:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ cpmulator -list-syscalls\nBDOS\n\t00 P_TERMCPM\n\t01 C_READ\n\t02 C_WRITE\n\t03 A_READ\n..snip..\nBIOS\n\t00 BOOT\n\t01 WBOOT\n..snip..\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ cpmulator -list-syscalls\nBDOS\n\t00 P_TERMCPM\n\t01 C_READ\n\t02 C_WRITE\n\t03 A_READ\n..snip..\nBIOS\n\t00 BOOT\n\t01 WBOOT\n..snip..\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eItems marked \"FAKE\" return \"appropriate\" values, rather than real values. Or are otherwise incomplete.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eThe only functions with significantly different behaviour are those which should send a single character to the printer (BDOS \"L_WRITE\" / BIOS \"LIST\"), they actually send their output to the file \u003ccode\u003eprint.log\u003c/code\u003e in the current-directory, creating it if necessary. (The path may be altered via the \u003ccode\u003e-prn-path\u003c/code\u003e command-line argument.)\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003eThe implementation of the syscalls is the core of our emulator, and they can be found here:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"/skx/cpmulator/blob/master/cpm/cpm_bdos.go\"\u003ecpm/cpm_bdos.go\u003c/a\u003e - BDOS functions.\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://www.seasip.info/Cpm/bdos.html\" rel=\"nofollow\"\u003ehttps://www.seasip.info/Cpm/bdos.html\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"/skx/cpmulator/blob/master/cpm/cpm_bios.go\"\u003ecpm/cpm_bios.go\u003c/a\u003e - BIOS functions.\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://www.seasip.info/Cpm/bios.html\" rel=\"nofollow\"\u003ehttps://www.seasip.info/Cpm/bios.html\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePortability\u003c/h1\u003e\u003ca id=\"user-content-portability\" class=\"anchor\" aria-label=\"Permalink: Portability\" href=\"#portability\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe CP/M input handlers need to disable echoing when reading (single) characters from STDIN. There isn't a simple and portable solution for this in golang, although the appropriate primitives exist so building such support isn't impossible, it just relies upon writing per-environment support, using something like the \u003ca href=\"https://pkg.go.dev/golang.org/x/term#ReadPassword\" rel=\"nofollow\"\u003eReadPassword\u003c/a\u003e function from the standard-library.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eI sidestepped this whole problem initially, just invoking the \u003ccode\u003estty\u003c/code\u003e binary to enable/disable the echoing of characters on-demand, but that only works on Linux, BSD, and Mac hosts. To be properly portable I had to use the \u003ca href=\"https://github.com/nsf/termbox-go\"\u003etermbox\u003c/a\u003e library for all input, but that means we get no scrollback/history so there's a tradeoff to be made.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eBy default input will be read via \u003ccode\u003etermbox\u003c/code\u003e but you may you specify a different driver via the CLI arguments:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003ecpmulator -input xxx\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eUse the input-driver named \u003ccode\u003exxx\u003c/code\u003e.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003ecpmulator -list-input-drivers\u003c/code\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eList all available input-drivers.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eDebugging Failures \u0026amp; Tweaking Behaviour\u003c/h1\u003e\u003ca id=\"user-content-debugging-failures--tweaking-behaviour\" class=\"anchor\" aria-label=\"Permalink: Debugging Failures \u0026amp; Tweaking Behaviour\" href=\"#debugging-failures--tweaking-behaviour\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWhen an unimplemented BIOS call is attempted the program it will abort with a fatal error, for example:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ ./cpmulator FOO.COM\n{\u0026quot;time\u0026quot;:\u0026quot;2024-04-14T15:39:34.560609302+03:00\u0026quot;,\n \u0026quot;level\u0026quot;:\u0026quot;ERROR\u0026quot;,\n \u0026quot;msg\u0026quot;:\u0026quot;Unimplemented syscall\u0026quot;,\n \u0026quot;syscall\u0026quot;:255,\n \u0026quot;syscallHex\u0026quot;:\u0026quot;0xFF\u0026quot;}\nError running FOO.COM: UNIMPLEMENTED\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ ./cpmulator FOO.COM\n{\"time\":\"2024-04-14T15:39:34.560609302+03:00\",\n \"level\":\"ERROR\",\n \"msg\":\"Unimplemented syscall\",\n \"syscall\":255,\n \"syscallHex\":\"0xFF\"}\nError running FOO.COM: UNIMPLEMENTED\n\u003c/code\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIf things are \u003cem\u003emostly\u003c/em\u003e working, but something is not quite producing the correct result then we have some notes on debugging:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"/skx/cpmulator/blob/master/DEBUGGING.md\"\u003eDEBUGGING.md\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eFor reference the memory map of our CP/M looks like this:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e0x0000 - Start of RAM\u003c/li\u003e\n\u003cli\u003e0xDE00 - The CCP\u003c/li\u003e\n\u003cli\u003e0xF000 - The BDOS (fake)\u003c/li\u003e\n\u003cli\u003e0xFE00 - The BIOS (fake)\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCredits and References\u003c/h1\u003e\u003ca id=\"user-content-credits-and-references\" class=\"anchor\" aria-label=\"Permalink: Credits and References\" href=\"#credits-and-references\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eMuch of the functionality of this repository comes from the \u003ca href=\"https://github.com/koron-go/z80\"\u003eexcellent Z80 emulator library\u003c/a\u003e it is using, written by \u003ca href=\"https://github.com/koron-go\"\u003e@koron-go\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eThe default CCP comes from \u003ca href=\"https://github.com/skx/z80-playground-cpm-fat/\"\u003emy fork\u003c/a\u003e of the original \u003ca href=\"https://github.com/z80playground/cpm-fat/\"\u003ecpm-fat\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eHowever this is largely unchanged from the \u003ca href=\"http://www.cpm.z80.de/source.html\" rel=\"nofollow\"\u003eoriginal CCP\u003c/a\u003e from Digital Research, although I did add the \u003ccode\u003eCLS\u003c/code\u003e, \u003ccode\u003eEXIT\u003c/code\u003e, \u003ccode\u003eHALT\u003c/code\u003e \u0026amp; \u003ccode\u003eQUIT\u003c/code\u003e built-in commands.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003eReference Documentation\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://www.seasip.info/Cpm/bdos.html\" rel=\"nofollow\"\u003eCP/M BDOS function reference\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://www.seasip.info/Cpm/bios.html\" rel=\"nofollow\"\u003eCP/M BIOS function reference\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"http://www.gaby.de/cpm/manuals/archive/cpm22htm/\" rel=\"nofollow\"\u003eCP/M Operating System Manual\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eContains an assembler reference, DDT commands, etc, etc.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003eOther emulators which were useful resources when some functionality was unclear:\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/ivanizag/iz-cpm\"\u003ehttps://github.com/ivanizag/iz-cpm\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003ePortable CP/M emulation to run CP/M 2.2 binaries for Z80.\u003c/li\u003e\n\u003cli\u003eHas a handy \"download\" script to fetch some CP/M binaries, including BASIC, Turbo Pascal, and WordStar.\u003c/li\u003e\n\u003cli\u003eWritten in Rust.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/jhallen/cpm\"\u003ehttps://github.com/jhallen/cpm\u003c/a\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eRun CP/M commands in Linux/Cygwin with this Z80 / BDOS / ADM-3A emulator.\u003c/li\u003e\n\u003cli\u003eWritten in C.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eRelease Checklist\u003c/h1\u003e\u003ca id=\"user-content-release-checklist\" class=\"anchor\" aria-label=\"Permalink: Release Checklist\" href=\"#release-checklist\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eBefore I make a release I carry out testing of the repository state, to avoid any obvious regressions. The following checklist is the bare minimum I carry out prior to making a new tagged-release.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eNote that the entries \"checked\" here are those entries which are tested automatically via the contents of \u003ca href=\"/skx/cpmulator/blob/master/test\"\u003etest/\u003c/a\u003e. (This automated testing essentially launches the emulator and pipes in fake keyboard input, then looks to see that the expected output is generated. Scripted automation, in other words.)\u003c/p\u003e\n\u003cul class=\"contains-task-list\"\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Confirm DDT can be used to trace execution of a simple binary.\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Confirm the A1 Apple Emulator can be launched, and BASIC will run.\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Play lighthouse of doom to completion, either victory or death.\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Compile HELLO.ASM with ASM \u0026amp; LOAD. Confirm\n\u003cul class=\"contains-task-list\"\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Confirm the generated binary executes successfully.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Compile ECHO.C with the Aztec C Compiler.\n\u003cul class=\"contains-task-list\"\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Confirm the generated binary executes successfully.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Run BBC Basic, and play a game.\n\u003cul class=\"contains-task-list\"\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\"\u003e Test \"SAVE\" and \"LOAD\" commands.\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\"\u003e Test saving tokenized AND raw versions. (i.e \u003ccode\u003eSAVE \"FOO\"\u003c/code\u003e, and \u003ccode\u003eSAVE \"FOO\", A\u003c/code\u003e.)\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Compile HELLO.PAS with Turbo Pascal.\n\u003cul class=\"contains-task-list\"\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Confirm the generated binary executes successfully.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Launch Zork1 and play for a few turns.\n\u003cul class=\"contains-task-list\"\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Test SAVE and RESTORE commands, and confirm they work.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\"\u003e Test BE.COM\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\"\u003e Test STAT.COM\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Test some built-in shell-commands; ERA, TYPE, and EXIT.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBugs?\u003c/h2\u003e\u003ca id=\"user-content-bugs\" class=\"anchor\" aria-label=\"Permalink: Bugs?\" href=\"#bugs\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eLet me know by filing an issue.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eSteve\u003c/p\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"cpmulator - A CP/M emulator written in golang","anchor":"cpmulator---a-cpm-emulator-written-in-golang","htmlText":"cpmulator - A CP/M emulator written in golang"},{"level":1,"text":"Installation \u0026 Versioning","anchor":"installation--versioning","htmlText":"Installation \u0026amp; Versioning"},{"level":1,"text":"Quick Start","anchor":"quick-start","htmlText":"Quick Start"},{"level":2,"text":"Docker-based Quick Start","anchor":"docker-based-quick-start","htmlText":"Docker-based Quick Start"},{"level":2,"text":"Local Quick Start","anchor":"local-quick-start","htmlText":"Local Quick Start"},{"level":1,"text":"Usage","anchor":"usage","htmlText":"Usage"},{"level":2,"text":"Command Line Flags","anchor":"command-line-flags","htmlText":"Command Line Flags"},{"level":2,"text":"Startup Processing","anchor":"startup-processing","htmlText":"Startup Processing"},{"level":2,"text":"Runtime Behaviour Changes","anchor":"runtime-behaviour-changes","htmlText":"Runtime Behaviour Changes"},{"level":3,"text":"CCP Handling","anchor":"ccp-handling","htmlText":"CCP Handling"},{"level":3,"text":"Ctrl-C Handling","anchor":"ctrl-c-handling","htmlText":"Ctrl-C Handling"},{"level":3,"text":"Console Input","anchor":"console-input","htmlText":"Console Input"},{"level":3,"text":"Console Output","anchor":"console-output","htmlText":"Console Output"},{"level":3,"text":"Debug Handling","anchor":"debug-handling","htmlText":"Debug Handling"},{"level":1,"text":"Drives vs. Directories","anchor":"drives-vs-directories","htmlText":"Drives vs. Directories"},{"level":1,"text":"Implemented Syscalls","anchor":"implemented-syscalls","htmlText":"Implemented Syscalls"},{"level":1,"text":"Portability","anchor":"portability","htmlText":"Portability"},{"level":1,"text":"Debugging Failures \u0026 Tweaking Behaviour","anchor":"debugging-failures--tweaking-behaviour","htmlText":"Debugging Failures \u0026amp; Tweaking Behaviour"},{"level":1,"text":"Credits and References","anchor":"credits-and-references","htmlText":"Credits and References"},{"level":1,"text":"Release Checklist","anchor":"release-checklist","htmlText":"Release Checklist"},{"level":2,"text":"Bugs?","anchor":"bugs","htmlText":"Bugs?"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fskx%2Fcpmulator"}},{"displayName":"LICENSE","repoName":"cpmulator","refName":"master","path":"LICENSE","preferredFileType":"license","tabName":"MIT","richText":null,"loaded":false,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":null,"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fskx%2Fcpmulator"}}],"overviewFilesProcessingTime":0}},"appPayload":{"helpUrl":"https://docs.github.com","findFileWorkerPath":"/assets-cdn/worker/find-file-worker-7d7eb7c71814.js","findInFileWorkerPath":"/assets-cdn/worker/find-in-file-worker-708ec8ade250.js","githubDevUrl":null,"enabled_features":{"copilot_workspace":null,"code_nav_ui_events":false,"overview_shared_code_dropdown_button":true,"react_blob_overlay":false,"accessible_code_button":true,"github_models_repo_integration":false}}}}</script> <div data-target="react-partial.reactRoot"><style 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aria-busy="false"><span class="TextInput-icon" id=":R2j5ab:" aria-hidden="true"><svg aria-hidden="true" focusable="false" class="octicon octicon-search" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M10.68 11.74a6 6 0 0 1-7.922-8.982 6 6 0 0 1 8.982 7.922l3.04 3.04a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215ZM11.5 7a4.499 4.499 0 1 0-8.997 0A4.499 4.499 0 0 0 11.5 7Z"></path></svg></span><input type="text" aria-label="Go to file" role="combobox" aria-controls="file-results-list" aria-expanded="false" aria-haspopup="dialog" autoCorrect="off" spellcheck="false" placeholder="Go to file" aria-describedby=":R2j5ab: :R2j5abH1:" data-component="input" class="prc-components-Input-Ic-y8" value=""/><span class="TextInput-icon" id=":R2j5abH1:" aria-hidden="true"></span></span></div><!--/$--></div><div class="Box-sc-g0xbh4-0 YUPas"><button type="button" class="prc-Button-ButtonBase-c50BI" data-loading="false" data-no-visuals="true" data-size="medium" data-variant="default" aria-describedby=":Rr5ab:-loading-announcement"><span data-component="buttonContent" data-align="center" class="prc-Button-ButtonContent-HKbr-"><span data-component="text" class="prc-Button-Label-pTQ3x">Go to file</span></span></button></div><div class="react-directory-add-file-icon"></div><div class="react-directory-remove-file-icon"></div></div><button type="button" aria-haspopup="true" aria-expanded="false" tabindex="0" class="prc-Button-ButtonBase-c50BI" data-loading="false" data-size="medium" data-variant="primary" aria-describedby=":R55ab:-loading-announcement" id=":R55ab:"><span data-component="buttonContent" data-align="center" class="prc-Button-ButtonContent-HKbr-"><span data-component="leadingVisual" class="prc-Button-Visual-2epfX prc-Button-VisualWrap-Db-eB"><svg aria-hidden="true" focusable="false" class="octicon octicon-code hide-sm" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="m11.28 3.22 4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734L13.94 8l-3.72-3.72a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215Zm-6.56 0a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042L2.06 8l3.72 3.72a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L.47 8.53a.75.75 0 0 1 0-1.06Z"></path></svg></span><span data-component="text" class="prc-Button-Label-pTQ3x">Code</span><span data-component="trailingVisual" class="prc-Button-Visual-2epfX prc-Button-VisualWrap-Db-eB"><svg aria-hidden="true" focusable="false" class="octicon octicon-triangle-down" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="m4.427 7.427 3.396 3.396a.25.25 0 0 0 .354 0l3.396-3.396A.25.25 0 0 0 11.396 7H4.604a.25.25 0 0 0-.177.427Z"></path></svg></span></span></button><div class="Box-sc-g0xbh4-0 izFOf"><button data-component="IconButton" type="button" aria-label="Open more actions menu" aria-haspopup="true" aria-expanded="false" tabindex="0" class="prc-Button-ButtonBase-c50BI prc-Button-IconButton-szpyj" data-loading="false" data-no-visuals="true" data-size="medium" data-variant="default" aria-describedby=":R75ab:-loading-announcement" id=":R75ab:"><svg aria-hidden="true" focusable="false" class="octicon octicon-kebab-horizontal" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M8 9a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3ZM1.5 9a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3Zm13 0a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3Z"></path></svg></button></div></div></div><div class="Box-sc-g0xbh4-0 vIPPs"><div data-hpc="true"><button hidden="" data-testid="focus-next-element-button" data-hotkey="j"></button><button hidden="" data-testid="focus-previous-element-button" data-hotkey="k"></button><h2 class="sr-only ScreenReaderHeading-module__userSelectNone--vW4Cq prc-Heading-Heading-6CmGO" data-testid="screen-reader-heading" id="folders-and-files">Folders and files</h2><table aria-labelledby="folders-and-files" class="Box-sc-g0xbh4-0 fdROMU"><thead class="Box-sc-g0xbh4-0 jGKpsv"><tr class="Box-sc-g0xbh4-0 jdgHnn"><th colSpan="2" class="Box-sc-g0xbh4-0 bQivRW"><span class="text-bold">Name</span></th><th colSpan="1" class="Box-sc-g0xbh4-0 ldkMIO"><span class="text-bold">Name</span></th><th class="hide-sm"><div title="Last commit message" class="Truncate__StyledTruncate-sc-23o1d2-0 liVpTx width-fit"><span class="text-bold">Last commit message</span></div></th><th colSpan="1" class="Box-sc-g0xbh4-0 jMbWeI"><div title="Last commit date" class="Truncate__StyledTruncate-sc-23o1d2-0 liVpTx width-fit"><span class="text-bold">Last commit date</span></div></th></tr></thead><tbody><tr class="Box-sc-g0xbh4-0 gpqjiB"><td colSpan="3" class="bgColor-muted p-1 rounded-top-2"><div class="Box-sc-g0xbh4-0 dzCJzi"><h2 class="sr-only ScreenReaderHeading-module__userSelectNone--vW4Cq prc-Heading-Heading-6CmGO" data-testid="screen-reader-heading">Latest commit</h2><div style="width:120px" class="Skeleton Skeleton--text" data-testid="loading"> </div><div class="d-flex flex-shrink-0 gap-2"><div data-testid="latest-commit-details" class="d-none d-sm-flex flex-items-center"></div><div class="d-flex gap-2"><h2 class="sr-only ScreenReaderHeading-module__userSelectNone--vW4Cq prc-Heading-Heading-6CmGO" data-testid="screen-reader-heading">History</h2><a href="/skx/cpmulator/commits/master/" class="prc-Button-ButtonBase-c50BI d-none d-lg-flex LinkButton-module__code-view-link-button--xvCGA flex-items-center fgColor-default" data-loading="false" data-size="small" data-variant="invisible" aria-describedby=":Raqj8pab:-loading-announcement"><span data-component="buttonContent" data-align="center" class="prc-Button-ButtonContent-HKbr-"><span data-component="leadingVisual" class="prc-Button-Visual-2epfX prc-Button-VisualWrap-Db-eB"><svg aria-hidden="true" focusable="false" class="octicon octicon-history" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="m.427 1.927 1.215 1.215a8.002 8.002 0 1 1-1.6 5.685.75.75 0 1 1 1.493-.154 6.5 6.5 0 1 0 1.18-4.458l1.358 1.358A.25.25 0 0 1 3.896 6H.25A.25.25 0 0 1 0 5.75V2.104a.25.25 0 0 1 .427-.177ZM7.75 4a.75.75 0 0 1 .75.75v2.992l2.028.812a.75.75 0 0 1-.557 1.392l-2.5-1A.751.751 0 0 1 7 8.25v-3.5A.75.75 0 0 1 7.75 4Z"></path></svg></span><span data-component="text" class="prc-Button-Label-pTQ3x"><span class="fgColor-default">377 Commits</span></span></span></a><div class="d-sm-none"></div><div class="d-flex d-lg-none"><span role="tooltip" aria-label="377 Commits" id="history-icon-button-tooltip" class="Tooltip__TooltipBase-sc-17tf59c-0 hWlpPn tooltipped-n"><a href="/skx/cpmulator/commits/master/" class="prc-Button-ButtonBase-c50BI LinkButton-module__code-view-link-button--xvCGA flex-items-center fgColor-default" data-loading="false" data-size="small" data-variant="invisible" aria-describedby=":R1iqj8pab:-loading-announcement history-icon-button-tooltip"><span data-component="buttonContent" data-align="center" class="prc-Button-ButtonContent-HKbr-"><span data-component="leadingVisual" class="prc-Button-Visual-2epfX prc-Button-VisualWrap-Db-eB"><svg aria-hidden="true" focusable="false" class="octicon octicon-history" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="m.427 1.927 1.215 1.215a8.002 8.002 0 1 1-1.6 5.685.75.75 0 1 1 1.493-.154 6.5 6.5 0 1 0 1.18-4.458l1.358 1.358A.25.25 0 0 1 3.896 6H.25A.25.25 0 0 1 0 5.75V2.104a.25.25 0 0 1 .427-.177ZM7.75 4a.75.75 0 0 1 .75.75v2.992l2.028.812a.75.75 0 0 1-.557 1.392l-2.5-1A.751.751 0 0 1 7 8.25v-3.5A.75.75 0 0 1 7.75 4Z"></path></svg></span></span></a></span></div></div></div></div></td></tr><tr class="react-directory-row undefined" id="folder-row-0"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title=".github" aria-label=".github, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/.github">.github</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title=".github" aria-label=".github, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/.github">.github</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-1"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="ccp" aria-label="ccp, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/ccp">ccp</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="ccp" aria-label="ccp, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/ccp">ccp</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-2"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="consolein" aria-label="consolein, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/consolein">consolein</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="consolein" aria-label="consolein, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/consolein">consolein</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-3"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="consoleout" aria-label="consoleout, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/consoleout">consoleout</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="consoleout" aria-label="consoleout, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/consoleout">consoleout</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-4"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="cpm" aria-label="cpm, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/cpm">cpm</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="cpm" aria-label="cpm, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/cpm">cpm</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-5"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="dist" aria-label="dist, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/dist">dist</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="dist" aria-label="dist, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/dist">dist</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-6"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="fcb" aria-label="fcb, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/fcb">fcb</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="fcb" aria-label="fcb, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/fcb">fcb</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-7"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="memory" aria-label="memory, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/memory">memory</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="memory" aria-label="memory, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/memory">memory</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-8"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="samples" aria-label="samples, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/samples">samples</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="samples" aria-label="samples, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/samples">samples</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row undefined" id="folder-row-9"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="static" aria-label="static, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/static">static</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="static" aria-label="static, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/static">static</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row truncate-for-mobile" id="folder-row-10"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="test" aria-label="test, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/test">test</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 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1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="version" aria-label="version, (Directory)" class="Link--primary" href="/skx/cpmulator/tree/master/version">version</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file-directory-fill icon-directory" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 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1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title=".gitignore" aria-label=".gitignore, (File)" class="Link--primary" href="/skx/cpmulator/blob/master/.gitignore">.gitignore</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file color-fg-muted" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0 1 13.25 16h-9.5A1.75 1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title=".gitignore" aria-label=".gitignore, (File)" class="Link--primary" href="/skx/cpmulator/blob/master/.gitignore">.gitignore</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row truncate-for-mobile" id="folder-row-13"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file color-fg-muted" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0 1 13.25 16h-9.5A1.75 1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="DEBUGGING.md" aria-label="DEBUGGING.md, (File)" class="Link--primary" href="/skx/cpmulator/blob/master/DEBUGGING.md">DEBUGGING.md</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" colSpan="1"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file color-fg-muted" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0 1 13.25 16h-9.5A1.75 1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="DEBUGGING.md" aria-label="DEBUGGING.md, (File)" class="Link--primary" href="/skx/cpmulator/blob/master/DEBUGGING.md">DEBUGGING.md</a></div></div></div></div></td><td class="react-directory-row-commit-cell"><div class="Skeleton Skeleton--text"> </div></td><td><div class="Skeleton Skeleton--text"> </div></td></tr><tr class="react-directory-row truncate-for-mobile" id="folder-row-14"><td class="react-directory-row-name-cell-small-screen" colSpan="2"><div class="react-directory-filename-column"><svg aria-hidden="true" focusable="false" class="octicon octicon-file color-fg-muted" viewBox="0 0 16 16" width="16" height="16" fill="currentColor" display="inline-block" overflow="visible" style="vertical-align:text-bottom"><path d="M2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0 1 13.25 16h-9.5A1.75 1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path></svg><div class="overflow-hidden"><div class="react-directory-filename-cell"><div class="react-directory-truncate"><a title="Dockerfile" aria-label="Dockerfile, (File)" class="Link--primary" href="/skx/cpmulator/blob/master/Dockerfile">Dockerfile</a></div></div></div></div></td><td class="react-directory-row-name-cell-large-screen" 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itemprop="text"><div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">cpmulator - A CP/M emulator written in golang</h1><a id="user-content-cpmulator---a-cpm-emulator-written-in-golang" class="anchor" aria-label="Permalink: cpmulator - A CP/M emulator written in golang" href="#cpmulator---a-cpm-emulator-written-in-golang"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">This repository contains a CP/M emulator, with integrated CCP ("Console Command Processor", i.e. shell), which is designed to run CP/M binaries. The project was initially created to run <a href="https://github.com/skx/lighthouse-of-doom/">a text-based adventure game</a> which I wrote a few years ago. (That game was written in Z80 assembly language targeting CP/M, later it was ported to the ZX Spectrum.)</p> <p dir="auto">Over time this project has become more complete, and I've now implemented enough functionity to run many of the well-known CP/M programs:</p> <ul dir="auto"> <li>The Aztec C-Compiler.</li> <li>Borland's Turbo Pascal.</li> <li>Many early Infocom games: <ul dir="auto"> <li>Zork 1, 2, & 3.</li> <li>Planetfall.</li> <li>etc.</li> </ul> </li> <li>BBC and Microsoft BASIC.</li> <li>Wordstar.</li> </ul> <p dir="auto">As things stand this project is "complete". I'd like to increase the test-coverage for my own reassurance, but I've now reached a point where all the binaries I've tried to execute work as expected. If you find a program that <em>doesn't</em> work please <a href="https://github.com/skx/cpmulator/issues">open an issue</a>, otherwise I suspect ongoing development will be minimal, and sporadic.</p> <blockquote> <p dir="auto"><strong>NOTE</strong> I've not implemented any notion of disk-support. This means that opening, reading/writing, and closing files is absolutely fine, but any API call that refers to tracks, sectors, or disks will fail (with an "unimplemented syscall" error).</p> </blockquote> <p dir="auto">A companion repository contains a collection of vintage CP/M software you can use with this, or any other, CP/M emulator:</p> <ul dir="auto"> <li><a href="https://github.com/skx/cpm-dist">https://github.com/skx/cpm-dist</a></li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Installation & Versioning</h1><a id="user-content-installation--versioning" class="anchor" aria-label="Permalink: Installation & Versioning" href="#installation--versioning"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">This emulator is written using golang, so if you have a working golang toolchain you can install in the standard way:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="go install github.com/skx/cpmulator@latest"><pre class="notranslate"><code>go install github.com/skx/cpmulator@latest </code></pre></div> <p dir="auto">If you were to clone this repository to your local system you could build, and install it, by running:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="go build . go install ."><pre class="notranslate"><code>go build . go install . </code></pre></div> <p dir="auto">If neither of these options are suitable you may download a binary from <a href="https://github.com/skx/cpmulator/releases">our release page</a>.</p> <p dir="auto">Releases will be made as/when features seem to justify it, but it should be noted that I consider the CLI tool, and the emulator itself, the "product". That means that the internal APIs will change around as/when necessary - so far changes have been minor, but I'm not averse to changing parameters to internal packages, or adding/renaming/removing methods as necessary without any regard for external users.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Quick Start</h1><a id="user-content-quick-start" class="anchor" aria-label="Permalink: Quick Start" href="#quick-start"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Docker-based Quick Start</h2><a id="user-content-docker-based-quick-start" class="anchor" aria-label="Permalink: Docker-based Quick Start" href="#docker-based-quick-start"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">If you've got docker installed you can launch things by running:</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="docker run --pull=always -t -i ghcr.io/skx/cpmulator:master"><pre>docker run --pull=always -t -i ghcr.io/skx/cpmulator:master</pre></div> <p dir="auto"><strong>NOTE</strong> You must run with the <code>-t</code> and <code>-i</code> flags, otherwise the console will be broken.</p> <p dir="auto">Once launched you can explore, for example to run Zork type:</p> <ul dir="auto"> <li><code>G:</code> <ul dir="auto"> <li>This will change to the G:-drive, which is where I've placed games.</li> </ul> </li> <li><code>ZORK1</code> <ul dir="auto"> <li>This will launch the Zork1 binary.</li> </ul> </li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Local Quick Start</h2><a id="user-content-local-quick-start" class="anchor" aria-label="Permalink: Local Quick Start" href="#local-quick-start"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li>Build/Install this application.</li> <li>Clone the associated repository of binaries: <ul dir="auto"> <li><code>git clone https://github.com/skx/cpm-dist.git /tmp/cpm-dist</code></li> </ul> </li> <li>Launch the emulator, pointing at the binaries: <ul dir="auto"> <li><code>cpmulator -cd /tmp/cpm-dist -directories</code></li> </ul> </li> <li>Start something: <ul dir="auto"> <li>"B:", then "MBASIC" - to run BASIC. (Type "SYSTEM" to exit.)</li> <li>"G:", then "ZORK1" - to play zork1.</li> <li>"P:", then "TURBO" - to run turbo pascal.</li> <li>"E:", then "WS" - to run wordstar.</li> </ul> </li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Usage</h1><a id="user-content-usage" class="anchor" aria-label="Permalink: Usage" href="#usage"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">If you launch <code>cpmulator</code> with no arguments then the default CCP will be launched, dropping you into a shell:</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="$ cpmulator A>dir A: LICENSE . | README .MD | CPMULATO. | GO .MOD A: GO .SUM | MAIN .GO | RET .COM A>TYPE LICENSE The MIT License (MIT) .. A>"><pre>$ cpmulator A<span class="pl-k">></span>dir A: LICENSE <span class="pl-c1">.</span> <span class="pl-k">|</span> README .MD <span class="pl-k">|</span> CPMULATO. <span class="pl-k">|</span> GO .MOD A: GO .SUM <span class="pl-k">|</span> MAIN .GO <span class="pl-k">|</span> RET .COM A<span class="pl-k">></span>TYPE LICENSE The MIT License (MIT) .. A<span class="pl-k">></span></pre></div> <p dir="auto">You can terminate the CCP by typing <code>EXIT</code>. The following built-in commands are available:</p> <details> <summary>Show the standard built-in commands of the default CCP:</summary> <ul dir="auto"> <li><code>CLS</code> <ul dir="auto"> <li>Clear the screen.</li> </ul> </li> <li><code>DIR</code> <ul dir="auto"> <li>Try "<code>DIR *.COM</code>" if you want to see only executables, for example.</li> </ul> </li> <li><code>EXIT</code> / <code>HALT</code> / <code>QUIT</code> <ul dir="auto"> <li>Terminate the CCP.</li> </ul> </li> <li><code>ERA</code> <ul dir="auto"> <li>Erase the named files, wildcards are permitted.</li> </ul> </li> <li><code>TYPE</code> <ul dir="auto"> <li>View the contents of the named file - wildcards are not permitted.</li> </ul> </li> <li><code>REN</code> <ul dir="auto"> <li>Rename files, so "<code>REN NEW=OLD</code>" - again note that wildcards are not permitted, nor is cross-drive renaming.</li> </ul> </li> </ul> </details> <p dir="auto">There are a pair of CCP implementations included within the emulator, and they can be selected via the <code>-ccp</code> command-line flag:</p> <ul dir="auto"> <li>"ccp" <ul dir="auto"> <li>The original CCP from Digital Research.</li> <li>Launch the emulator via <code>cpmulator -ccp=ccp ..</code>, or use <code>A:!CCP CCP</code> to change to it at run-time.</li> </ul> </li> <li>"ccpz" <ul dir="auto"> <li>An enhanced CCP, which is the default</li> <li>"<code>GET 0100 FOO.COM</code>" will load a binary into RAM, at address 0x100. Then "<code>JMP 0100</code>" will launch it.</li> <li>There are also built-in <code>PEEK</code> and <code>POKE</code> commands which can show/set memory contents.</li> <li><code>LIST file.ext</code> will "print" the contents of <code>file.ext</code>, but see the note later about printer-output (TLDR; We write it to <code>print.log</code>.)</li> <li>The prompt will show the currently-selected user-number, for example if you run "USER 3".</li> <li>If a command isn't found in the current drive A: will be searched instead, which is handy.</li> <li>Finally any line beginning with the comment-character (<code>#</code>) will be ignored, which is useful for commenting purposes inside SUBMIT files.</li> </ul> </li> </ul> <p dir="auto">You can also launch a binary directly by specifying it's path upon the command-line, followed by any optional arguments that the binary accepts or requires:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ cpmulator /path/to/binary [optional-args]"><pre class="notranslate"><code>$ cpmulator /path/to/binary [optional-args] </code></pre></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Command Line Flags</h2><a id="user-content-command-line-flags" class="anchor" aria-label="Permalink: Command Line Flags" href="#command-line-flags"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">There are many available command-line options, which are shown in the output of <code>cpmulator -help</code>, but the following summary shows the most important/useful options:</p> <ul dir="auto"> <li><code>-cd /path/to/directory</code> <ul dir="auto"> <li>Change to the given directory before running.</li> </ul> </li> <li><code>-directories</code> <ul dir="auto"> <li>Use directories on the host for drive-contents, discussed later in this document.</li> </ul> </li> <li><code>-embed</code> <ul dir="auto"> <li>Enable/Disable the embedded binaries we unconditionally add to the A:-drive. (The utilities to change the output driver, toggle debugging, etc.)</li> </ul> </li> <li><code>-log-path /path/to/file</code> <ul dir="auto"> <li>Output debug-logs to the given file, creating it if necessary.</li> <li><strong>NOTE</strong>: You can run <code>A:!DEBUG 1</code> to enable "quick debug logging", and <code>A:!DEBUG 0</code> to turn it back off again, at runtime.</li> </ul> </li> <li><code>-prn-path /path/to/file</code> <ul dir="auto"> <li>All output which CP/M sends to the "printer" will be written to the given file.</li> </ul> </li> <li><code>-list-syscalls</code> <ul dir="auto"> <li>Dump the list of implemented BDOS and BIOS syscalls.</li> </ul> </li> <li><code>-list-input-drivers</code> and <code>-list-output-drivers</code> to see the available I/O driver-names, which may then be selected via the <code>-input</code> and <code>-output</code> flags.</li> <li><code>-version</code> <ul dir="auto"> <li>Show the version number of the emulator, and exit.</li> </ul> </li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Startup Processing</h2><a id="user-content-startup-processing" class="anchor" aria-label="Permalink: Startup Processing" href="#startup-processing"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">When the CCP is launched for interactive execution, we allow commands to be executed at startup:</p> <ul dir="auto"> <li>If <code>SUBMIT.COM</code> <strong>and</strong> <code>AUTOEXEC.SUB</code> exist on A:</li> <li>Then the contents of <code>AUTOEXEC.SUB</code> will be executed. <ul dir="auto"> <li>We secretly run "<code>SUBMIT AUTOEXEC</code>" to achieve this.</li> </ul> </li> </ul> <p dir="auto">This allows you to customize the emulator, or perform other "one-time" setup via the options described in the next section.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Runtime Behaviour Changes</h2><a id="user-content-runtime-behaviour-changes" class="anchor" aria-label="Permalink: Runtime Behaviour Changes" href="#runtime-behaviour-changes"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">There are a small number of <a href="/skx/cpmulator/blob/master/EXTENSIONS.md">extensions</a> added to the BIOS functionality we provide, and these extensions allow changing some aspects of the emulator at runtime.</p> <p dir="auto">The behaviour changing is achieved by having a small number of .COM files invoke the extension functions, and these binaries are embedded within our emulator to improve ease of use, via the <a href="/skx/cpmulator/blob/master/static">static/</a> directory in our source-tree. This means no matter what you'll always find some binaries installed on A:, despite not being present in reality - you can disable the appearance of these binaries via the <code>-embed=false</code> command-line flag.</p> <blockquote> <p dir="auto"><strong>NOTE</strong> To avoid naming collisions all our embedded binaries are named with a <code>!</code> prefix, except for <code>#.COM</code> which is designed to be used as a comment-binary.</p> </blockquote> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">CCP Handling</h3><a id="user-content-ccp-handling" class="anchor" aria-label="Permalink: CCP Handling" href="#ccp-handling"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">We default to loading the enhanced CCP, but allow the original from Digital Research to be used via the <code>-ccp</code> command-line flag. The binary <code>A:!CCP.COM</code> lets you change CCP at runtime.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Ctrl-C Handling</h3><a id="user-content-ctrl-c-handling" class="anchor" aria-label="Permalink: Ctrl-C Handling" href="#ctrl-c-handling"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Traditionally pressing <code>Ctrl-C</code> would reload the CCP, via a soft boot. I think that combination is likely to be entered by accident, so in <code>cpmulator</code> we default to requiring you to press Ctrl-C <em>twice</em> in a row to reboot the CCP.</p> <p dir="auto">The binary <code>A:!CTRLC.COM</code> which lets you change this at runtime. Run <code>A:!CTRLC 0</code> to disable the Ctrl-C behaviour, or <code>A:!CTRLC N</code> to require N consecutive Ctrl-C keystrokes to trigger the restart-behaviour (max: 9).</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Console Input</h3><a id="user-content-console-input" class="anchor" aria-label="Permalink: Console Input" href="#console-input"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">We default to using the portable <code>termbox-go</code>-based input-handler, this can be changed via the <code>-input</code> command-line flag at startup. Additionally it can be changed at runtime via <code>A:!INPUT.COM</code>.</p> <p dir="auto">Run <code>A:!INPUT stty</code> to use the non-portable Unix-centric approach which provides a scrollback, and uses the system's <code>stty</code> binary to enable/disable character echoing.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Console Output</h3><a id="user-content-console-output" class="anchor" aria-label="Permalink: Console Output" href="#console-output"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">We default to pretending our output device is an ADM-3A terminal, this can be changed via the <code>-output</code> command-line flag at startup. Additionally it can be changed at runtime via <code>A:!OUTPUT.COM</code>.</p> <p dir="auto">Run <code>A:!OUTPUT ansi</code> to disable the output emulation, or <code>A:!OUTPUT adm-3a</code> to restore it.</p> <p dir="auto">You'll see that the <a href="https://github.com/skx/cpm-dist">cpm-dist</a> repository contains a version of Wordstar, and that behaves differently depending on the selected output handler. Changing the handler at run-time is a neat bit of behaviour.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Debug Handling</h3><a id="user-content-debug-handling" class="anchor" aria-label="Permalink: Debug Handling" href="#debug-handling"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">We expect that all <em>real</em> debugging will involve the comprehensive logfile which is created via the <code>-log-path</code> argument to the emulator, however we have a "quick debug" option which will merely log the syscalls which are invoked, and this has the advantage that it can be enabled, or disabled, at runtime.</p> <p dir="auto"><code>A:!DEBUG.COM</code> will show the state of the flag, and it can be enabled with <code>A:!DEBUG 1</code> or disabled with <code>!DEBUG 0</code>.</p> <p dir="auto">Finally <code>A:!VERSION.COM</code> will show you the version of the emulator you're running.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Drives vs. Directories</h1><a id="user-content-drives-vs-directories" class="anchor" aria-label="Permalink: Drives vs. Directories" href="#drives-vs-directories"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">By default when you launch <code>cpmulator</code> with no arguments you'll be presented with the CCP interface, with A: as the current drive. In this mode A:, B:, C:, and all other drives, will refer to the current-working directory from which you launched the emulator. This is perhaps the most practical way to get started, but it means that files are repeated across drives:</p> <ul dir="auto"> <li>i.e. "<code>A:FOO</code>" is the same as "<code>B:FOO</code>", and if you delete "<code>C:FOO</code>" you'll find it has vanished from all drives. <ul dir="auto"> <li>In short "<code>FOO</code>" will exist on drives <code>A:</code> all the way through to <code>P:</code>.</li> </ul> </li> </ul> <p dir="auto">If you prefer you may configure drives to be distinct, each drive referring to a distinct sub-directory upon the host system (i.e. the machine you're running on):</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="$ mkdir A/ ; touch A/LS.COM ; touch A/FOO.COM $ mkdir B/ ; touch B/DU.COM ; touch B/BAR.COM $ mkdir G/ ; touch G/ME.COM ; touch G/BAZ.COM"><pre>$ mkdir A/ <span class="pl-k">;</span> touch A/LS.COM <span class="pl-k">;</span> touch A/FOO.COM $ mkdir B/ <span class="pl-k">;</span> touch B/DU.COM <span class="pl-k">;</span> touch B/BAR.COM $ mkdir G/ <span class="pl-k">;</span> touch G/ME.COM <span class="pl-k">;</span> touch G/BAZ.COM</pre></div> <p dir="auto">Now if you launch the emulator you'll see only the files which <em>should</em> be visible on the appropriate drive:</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="$ cpmulator -directories A>DIR A: A: FOO .COM | LS .COM A>DIR B: B: BAR .COM | DU .COM A>DIR G: G: BAZ .COM | ME .COM A>DIR E: No file"><pre>$ cpmulator -directories A<span class="pl-k">></span>DIR A: A: FOO .COM <span class="pl-k">|</span> LS .COM A<span class="pl-k">></span>DIR B: B: BAR .COM <span class="pl-k">|</span> DU .COM A<span class="pl-k">></span>DIR G: G: BAZ .COM <span class="pl-k">|</span> ME .COM A<span class="pl-k">></span>DIR E: No file</pre></div> <p dir="auto">A companion repository contains a larger collection of vintage CP/M software you can use with this emulator:</p> <ul dir="auto"> <li><a href="https://github.com/skx/cpm-dist">https://github.com/skx/cpm-dist</a></li> </ul> <p dir="auto">This is arranged into subdirectories, on the assumption you'll run with the <code>-directories</code> flag, and the drives are thus used as a means of organization. For example you might want to look at games, on the <code>G:</code> drive, or the BASIC interpreters on the <code>B:</code> drive:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="frodo ~/Repos/github.com/skx/cpm-dist $ cpmulator -directories A>g: G>dir *.com G: HITCH .COM | LEATHER .COM | LIHOUSE .COM | PLANET .COM G: ZORK1 .COM | ZORK2 .COM | ZORK3 .COM G>dir b:*.com B: MBASIC .COM | OBASIC .COM | TBASIC .COM"><pre class="notranslate"><code>frodo ~/Repos/github.com/skx/cpm-dist $ cpmulator -directories A>g: G>dir *.com G: HITCH .COM | LEATHER .COM | LIHOUSE .COM | PLANET .COM G: ZORK1 .COM | ZORK2 .COM | ZORK3 .COM G>dir b:*.com B: MBASIC .COM | OBASIC .COM | TBASIC .COM </code></pre></div> <p dir="auto">You can also point specific drives to particular paths via the <code>-drive-X</code> command-line arguments. For example the following would have A: and B: pointed to custom paths, and C:-P: using the current working directory:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ cpmulator -ccp=ccpz -drive-a /tmp -drive-b ~/Repos/github.com/skx/cpm-dist/G/"><pre class="notranslate"><code>$ cpmulator -ccp=ccpz -drive-a /tmp -drive-b ~/Repos/github.com/skx/cpm-dist/G/ </code></pre></div> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Implemented Syscalls</h1><a id="user-content-implemented-syscalls" class="anchor" aria-label="Permalink: Implemented Syscalls" href="#implemented-syscalls"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">You can see the list of implemented syscalls, along with a mention of how complete their implementation is, by running:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ cpmulator -list-syscalls BDOS 00 P_TERMCPM 01 C_READ 02 C_WRITE 03 A_READ ..snip.. BIOS 00 BOOT 01 WBOOT ..snip.."><pre class="notranslate"><code>$ cpmulator -list-syscalls BDOS 00 P_TERMCPM 01 C_READ 02 C_WRITE 03 A_READ ..snip.. BIOS 00 BOOT 01 WBOOT ..snip.. </code></pre></div> <p dir="auto">Items marked "FAKE" return "appropriate" values, rather than real values. Or are otherwise incomplete.</p> <blockquote> <p dir="auto">The only functions with significantly different behaviour are those which should send a single character to the printer (BDOS "L_WRITE" / BIOS "LIST"), they actually send their output to the file <code>print.log</code> in the current-directory, creating it if necessary. (The path may be altered via the <code>-prn-path</code> command-line argument.)</p> </blockquote> <p dir="auto">The implementation of the syscalls is the core of our emulator, and they can be found here:</p> <ul dir="auto"> <li><a href="/skx/cpmulator/blob/master/cpm/cpm_bdos.go">cpm/cpm_bdos.go</a> - BDOS functions. <ul dir="auto"> <li><a href="https://www.seasip.info/Cpm/bdos.html" rel="nofollow">https://www.seasip.info/Cpm/bdos.html</a></li> </ul> </li> <li><a href="/skx/cpmulator/blob/master/cpm/cpm_bios.go">cpm/cpm_bios.go</a> - BIOS functions. <ul dir="auto"> <li><a href="https://www.seasip.info/Cpm/bios.html" rel="nofollow">https://www.seasip.info/Cpm/bios.html</a></li> </ul> </li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Portability</h1><a id="user-content-portability" class="anchor" aria-label="Permalink: Portability" href="#portability"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">The CP/M input handlers need to disable echoing when reading (single) characters from STDIN. There isn't a simple and portable solution for this in golang, although the appropriate primitives exist so building such support isn't impossible, it just relies upon writing per-environment support, using something like the <a href="https://pkg.go.dev/golang.org/x/term#ReadPassword" rel="nofollow">ReadPassword</a> function from the standard-library.</p> <p dir="auto">I sidestepped this whole problem initially, just invoking the <code>stty</code> binary to enable/disable the echoing of characters on-demand, but that only works on Linux, BSD, and Mac hosts. To be properly portable I had to use the <a href="https://github.com/nsf/termbox-go">termbox</a> library for all input, but that means we get no scrollback/history so there's a tradeoff to be made.</p> <p dir="auto">By default input will be read via <code>termbox</code> but you may you specify a different driver via the CLI arguments:</p> <ul dir="auto"> <li><code>cpmulator -input xxx</code> <ul dir="auto"> <li>Use the input-driver named <code>xxx</code>.</li> </ul> </li> <li><code>cpmulator -list-input-drivers</code> <ul dir="auto"> <li>List all available input-drivers.</li> </ul> </li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Debugging Failures & Tweaking Behaviour</h1><a id="user-content-debugging-failures--tweaking-behaviour" class="anchor" aria-label="Permalink: Debugging Failures & Tweaking Behaviour" href="#debugging-failures--tweaking-behaviour"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">When an unimplemented BIOS call is attempted the program it will abort with a fatal error, for example:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ ./cpmulator FOO.COM {"time":"2024-04-14T15:39:34.560609302+03:00", "level":"ERROR", "msg":"Unimplemented syscall", "syscall":255, "syscallHex":"0xFF"} Error running FOO.COM: UNIMPLEMENTED"><pre class="notranslate"><code>$ ./cpmulator FOO.COM {"time":"2024-04-14T15:39:34.560609302+03:00", "level":"ERROR", "msg":"Unimplemented syscall", "syscall":255, "syscallHex":"0xFF"} Error running FOO.COM: UNIMPLEMENTED </code></pre></div> <p dir="auto">If things are <em>mostly</em> working, but something is not quite producing the correct result then we have some notes on debugging:</p> <ul dir="auto"> <li><a href="/skx/cpmulator/blob/master/DEBUGGING.md">DEBUGGING.md</a></li> </ul> <p dir="auto">For reference the memory map of our CP/M looks like this:</p> <ul dir="auto"> <li>0x0000 - Start of RAM</li> <li>0xDE00 - The CCP</li> <li>0xF000 - The BDOS (fake)</li> <li>0xFE00 - The BIOS (fake)</li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Credits and References</h1><a id="user-content-credits-and-references" class="anchor" aria-label="Permalink: Credits and References" href="#credits-and-references"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li>Much of the functionality of this repository comes from the <a href="https://github.com/koron-go/z80">excellent Z80 emulator library</a> it is using, written by <a href="https://github.com/koron-go">@koron-go</a>.</li> <li>The default CCP comes from <a href="https://github.com/skx/z80-playground-cpm-fat/">my fork</a> of the original <a href="https://github.com/z80playground/cpm-fat/">cpm-fat</a> <ul dir="auto"> <li>However this is largely unchanged from the <a href="http://www.cpm.z80.de/source.html" rel="nofollow">original CCP</a> from Digital Research, although I did add the <code>CLS</code>, <code>EXIT</code>, <code>HALT</code> & <code>QUIT</code> built-in commands.</li> </ul> </li> <li>Reference Documentation <ul dir="auto"> <li><a href="https://www.seasip.info/Cpm/bdos.html" rel="nofollow">CP/M BDOS function reference</a>.</li> <li><a href="https://www.seasip.info/Cpm/bios.html" rel="nofollow">CP/M BIOS function reference</a>.</li> <li><a href="http://www.gaby.de/cpm/manuals/archive/cpm22htm/" rel="nofollow">CP/M Operating System Manual</a> <ul dir="auto"> <li>Contains an assembler reference, DDT commands, etc, etc.</li> </ul> </li> </ul> </li> <li>Other emulators which were useful resources when some functionality was unclear: <ul dir="auto"> <li><a href="https://github.com/ivanizag/iz-cpm">https://github.com/ivanizag/iz-cpm</a> <ul dir="auto"> <li>Portable CP/M emulation to run CP/M 2.2 binaries for Z80.</li> <li>Has a handy "download" script to fetch some CP/M binaries, including BASIC, Turbo Pascal, and WordStar.</li> <li>Written in Rust.</li> </ul> </li> <li><a href="https://github.com/jhallen/cpm">https://github.com/jhallen/cpm</a> <ul dir="auto"> <li>Run CP/M commands in Linux/Cygwin with this Z80 / BDOS / ADM-3A emulator.</li> <li>Written in C.</li> </ul> </li> </ul> </li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Release Checklist</h1><a id="user-content-release-checklist" class="anchor" aria-label="Permalink: Release Checklist" href="#release-checklist"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Before I make a release I carry out testing of the repository state, to avoid any obvious regressions. The following checklist is the bare minimum I carry out prior to making a new tagged-release.</p> <p dir="auto">Note that the entries "checked" here are those entries which are tested automatically via the contents of <a href="/skx/cpmulator/blob/master/test">test/</a>. (This automated testing essentially launches the emulator and pipes in fake keyboard input, then looks to see that the expected output is generated. Scripted automation, in other words.)</p> <ul class="contains-task-list"> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Confirm DDT can be used to trace execution of a simple binary.</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Confirm the A1 Apple Emulator can be launched, and BASIC will run.</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Play lighthouse of doom to completion, either victory or death.</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Compile HELLO.ASM with ASM & LOAD. Confirm <ul class="contains-task-list"> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Confirm the generated binary executes successfully.</li> </ul> </li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Compile ECHO.C with the Aztec C Compiler. <ul class="contains-task-list"> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Confirm the generated binary executes successfully.</li> </ul> </li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Run BBC Basic, and play a game. <ul class="contains-task-list"> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Test "SAVE" and "LOAD" commands.</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Test saving tokenized AND raw versions. (i.e <code>SAVE "FOO"</code>, and <code>SAVE "FOO", A</code>.)</li> </ul> </li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Compile HELLO.PAS with Turbo Pascal. <ul class="contains-task-list"> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Confirm the generated binary executes successfully.</li> </ul> </li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Launch Zork1 and play for a few turns. <ul class="contains-task-list"> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Test SAVE and RESTORE commands, and confirm they work.</li> </ul> </li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Test BE.COM</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Test STAT.COM</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Test some built-in shell-commands; ERA, TYPE, and EXIT.</li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Bugs?</h2><a id="user-content-bugs" class="anchor" aria-label="Permalink: Bugs?" href="#bugs"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Let me know by filing an issue.</p> <p dir="auto">Steve</p> </article></div></div></div></div></div> <!-- --> <!-- --> <script type="application/json" id="__PRIMER_DATA_:R0:__">{"resolvedServerColorMode":"day"}</script></div> </react-partial> <input type="hidden" data-csrf="true" value="MQ52yPR+VjxcvL9kJRauNAhZfuovhcBR6VpOQ2Oscb9+ZFvqpIARXolOzO+bdgVQUHqOD1hDQX6FH1etbB/d0Q==" /> </div> <div data-view-component="true" class="Layout-sidebar"> <div class="BorderGrid about-margin" data-pjax> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <div class="hide-sm hide-md"> <h2 class="mb-3 h4">About</h2> <p class="f4 my-3"> Golang CP/M emulator for zork, Microsoft BASIC, Turbo Pascal, Wordstar, lighthouse-of-doom, etc </p> <h3 class="sr-only">Topics</h3> <div class="my-3"> <div class="f6"> <a href="/topics/golang" title="Topic: golang" data-view-component="true" class="topic-tag topic-tag-link"> golang </a> <a href="/topics/emulation" title="Topic: emulation" data-view-component="true" class="topic-tag topic-tag-link"> emulation </a> <a href="/topics/z80" title="Topic: z80" data-view-component="true" class="topic-tag topic-tag-link"> z80 </a> <a href="/topics/zork" title="Topic: zork" data-view-component="true" class="topic-tag topic-tag-link"> zork </a> <a href="/topics/cpm" title="Topic: cpm" data-view-component="true" class="topic-tag topic-tag-link"> cpm </a> <a href="/topics/golang-application" title="Topic: golang-application" data-view-component="true" class="topic-tag topic-tag-link"> golang-application </a> </div> </div> <h3 class="sr-only">Resources</h3> <div class="mt-2"> <a class="Link--muted" data-analytics-event="{"category":"Repository Overview","action":"click","label":"location:sidebar;file:readme"}" href="#readme-ov-file"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" 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1.5h-.427l2.111 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.006.005-.01.01-.045.04c-.21.176-.441.327-.686.45C14.556 10.78 13.88 11 13 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L12.178 4.5h-.162c-.305 0-.604-.079-.868-.231l-1.29-.736a.245.245 0 0 0-.124-.033H8.75V13h2.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1 0-1.5h2.5V3.5h-.984a.245.245 0 0 0-.124.033l-1.289.737c-.265.15-.564.23-.869.23h-.162l2.112 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.016.015-.045.04c-.21.176-.441.327-.686.45C4.556 10.78 3.88 11 3 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L2.178 4.5H1.75a.75.75 0 0 1 0-1.5h2.234a.249.249 0 0 0 .125-.033l1.288-.737c.265-.15.564-.23.869-.23h.984V.75a.75.75 0 0 1 1.5 0Zm2.945 8.477c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327Zm-10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 6.327Z"></path> </svg> MIT license </a> </div> <include-fragment src="/skx/cpmulator/hovercards/citation/sidebar_partial?tree_name=master"> </include-fragment> <div class="mt-2"> <a href="/skx/cpmulator/activity" data-view-component="true" class="Link Link--muted"><svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-pulse mr-2"> <path d="M6 2c.306 0 .582.187.696.471L10 10.731l1.304-3.26A.751.751 0 0 1 12 7h3.25a.75.75 0 0 1 0 1.5h-2.742l-1.812 4.528a.751.751 0 0 1-1.392 0L6 4.77 4.696 8.03A.75.75 0 0 1 4 8.5H.75a.75.75 0 0 1 0-1.5h2.742l1.812-4.529A.751.751 0 0 1 6 2Z"></path> </svg> <span class="color-fg-muted">Activity</span></a> </div> <h3 class="sr-only">Stars</h3> <div class="mt-2"> <a href="/skx/cpmulator/stargazers" data-view-component="true" class="Link Link--muted"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star mr-2"> <path d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"></path> </svg> <strong>111</strong> stars</a> </div> <h3 class="sr-only">Watchers</h3> <div class="mt-2"> <a href="/skx/cpmulator/watchers" data-view-component="true" class="Link Link--muted"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-eye mr-2"> <path d="M8 2c1.981 0 3.671.992 4.933 2.078 1.27 1.091 2.187 2.345 2.637 3.023a1.62 1.62 0 0 1 0 1.798c-.45.678-1.367 1.932-2.637 3.023C11.67 13.008 9.981 14 8 14c-1.981 0-3.671-.992-4.933-2.078C1.797 10.83.88 9.576.43 8.898a1.62 1.62 0 0 1 0-1.798c.45-.677 1.367-1.931 2.637-3.022C4.33 2.992 6.019 2 8 2ZM1.679 7.932a.12.12 0 0 0 0 .136c.411.622 1.241 1.75 2.366 2.717C5.176 11.758 6.527 12.5 8 12.5c1.473 0 2.825-.742 3.955-1.715 1.124-.967 1.954-2.096 2.366-2.717a.12.12 0 0 0 0-.136c-.412-.621-1.242-1.75-2.366-2.717C10.824 4.242 9.473 3.5 8 3.5c-1.473 0-2.825.742-3.955 1.715-1.124.967-1.954 2.096-2.366 2.717ZM8 10a2 2 0 1 1-.001-3.999A2 2 0 0 1 8 10Z"></path> </svg> <strong>6</strong> watching</a> </div> <h3 class="sr-only">Forks</h3> <div class="mt-2"> <a href="/skx/cpmulator/forks" data-view-component="true" class="Link Link--muted"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked mr-2"> <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path> </svg> <strong>4</strong> forks</a> </div> <div class="mt-2"> <a class="Link--muted" href="/contact/report-content?content_url=https%3A%2F%2Fgithub.com%2Fskx%2Fcpmulator&report=skx+%28user%29"> Report repository </a> </div> </div> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame"> <a href="/skx/cpmulator/releases" data-view-component="true" class="Link--primary no-underline Link">Releases <span title="16" data-view-component="true" class="Counter">16</span></a></h2> <a class="Link--primary d-flex no-underline" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/skx/cpmulator/releases/tag/v0.16.0"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-tag flex-shrink-0 mt-1 color-fg-success"> <path d="M1 7.775V2.75C1 1.784 1.784 1 2.75 1h5.025c.464 0 .91.184 1.238.513l6.25 6.25a1.75 1.75 0 0 1 0 2.474l-5.026 5.026a1.75 1.75 0 0 1-2.474 0l-6.25-6.25A1.752 1.752 0 0 1 1 7.775Zm1.5 0c0 .066.026.13.073.177l6.25 6.25a.25.25 0 0 0 .354 0l5.025-5.025a.25.25 0 0 0 0-.354l-6.25-6.25a.25.25 0 0 0-.177-.073H2.75a.25.25 0 0 0-.25.25ZM6 5a1 1 0 1 1 0 2 1 1 0 0 1 0-2Z"></path> </svg> <div class="ml-2 min-width-0"> <div class="d-flex"> <span class="css-truncate css-truncate-target text-bold mr-2" style="max-width: none;">v0.16.0</span> <span title="Label: Latest" data-view-component="true" class="Label Label--success flex-shrink-0"> Latest </span> </div> <div class="text-small color-fg-muted"><relative-time datetime="2025-01-25T17:45:13Z" class="no-wrap">Jan 25, 2025</relative-time></div> </div> </a> <div data-view-component="true" class="mt-3"> <a text="small" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/skx/cpmulator/releases" data-view-component="true" class="Link">+ 15 releases</a></div> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <include-fragment src="/skx/cpmulator/packages_list?current_repository=cpmulator" aria-busy="true" aria-label="Loading latest packages"> <h2 class="h4 mb-3"> <a href="/users/skx/packages?repo_name=cpmulator" data-view-component="true" class="Link--primary no-underline Link d-flex flex-items-center">Packages <span title="0" hidden="hidden" data-view-component="true" class="Counter ml-1">0</span></a></h2> <div class="mb-2 d-flex flex-items-center"> <div class="Skeleton mr-2" style="width:20px;height:20px;"></div> <div class="Skeleton Skeleton--text flex-auto"> </div> </div> <div class="mb-2 d-flex flex-items-center"> <div class="Skeleton mr-2" style="width:20px;height:20px;"></div> <div class="Skeleton Skeleton--text flex-auto"> </div> </div> <div class="mb-2 d-flex flex-items-center"> <div class="Skeleton mr-2" style="width:20px;height:20px;"></div> <div class="Skeleton Skeleton--text flex-auto"> </div> </div> </include-fragment> </div> </div> <div class="BorderGrid-row" hidden> <div class="BorderGrid-cell"> <include-fragment src="/skx/cpmulator/used_by_list" accept="text/fragment+html"> </include-fragment> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3"> <a href="/skx/cpmulator/graphs/contributors" data-view-component="true" class="Link--primary no-underline Link d-flex flex-items-center">Contributors <span title="2" data-view-component="true" class="Counter ml-1">2</span></a></h2> <include-fragment src="/skx/cpmulator/contributors_list?count=2&current_repository=cpmulator&items_to_show=2" aria-busy="true" aria-label="Loading contributors"> <ul class="list-style-none "> 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data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> <span style="background-color:#384d54 !important;;width: 0.5%;" itemprop="keywords" data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> <span style="background-color:#427819 !important;;width: 0.5%;" itemprop="keywords" data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> <span style="background-color:#c4a79c !important;;width: 0.4%;" itemprop="keywords" data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> </span></div> <ul class="list-style-none"> <li class="d-inline"> <a class="d-inline-flex flex-items-center flex-nowrap Link--secondary no-underline text-small mr-3" href="/skx/cpmulator/search?l=go" data-ga-click="Repository, language stats search click, location:repo overview"> <svg style="color:#00ADD8;" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-dot-fill mr-2"> <path d="M8 4a4 4 0 1 1 0 8 4 4 0 0 1 0-8Z"></path> </svg> <span class="color-fg-default text-bold mr-1">Go</span> <span>71.9%</span> </a> </li> <li class="d-inline"> <a class="d-inline-flex flex-items-center flex-nowrap Link--secondary no-underline text-small mr-3" href="/skx/cpmulator/search?l=assembly" data-ga-click="Repository, language stats search click, location:repo overview"> <svg style="color:#6E4C13;" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-dot-fill mr-2"> <path d="M8 4a4 4 0 1 1 0 8 4 4 0 0 1 0-8Z"></path> </svg> <span class="color-fg-default text-bold mr-1">Assembly</span> <span>26.1%</span> </a> </li> <li class="d-inline"> <a class="d-inline-flex flex-items-center flex-nowrap Link--secondary no-underline text-small mr-3" href="/skx/cpmulator/search?l=shell" data-ga-click="Repository, language stats search click, location:repo overview"> <svg 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href="/skx/cpmulator/search?l=makefile" data-ga-click="Repository, language stats search click, location:repo overview"> <svg style="color:#427819;" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-dot-fill mr-2"> <path d="M8 4a4 4 0 1 1 0 8 4 4 0 0 1 0-8Z"></path> </svg> <span class="color-fg-default text-bold mr-1">Makefile</span> <span>0.5%</span> </a> </li> <li class="d-inline"> <a class="d-inline-flex flex-items-center flex-nowrap Link--secondary no-underline text-small mr-3" href="/skx/cpmulator/search?l=max" data-ga-click="Repository, language stats search click, location:repo overview"> <svg style="color:#c4a79c;" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-dot-fill mr-2"> <path d="M8 4a4 4 0 1 1 0 8 4 4 0 0 1 0-8Z"></path> </svg> <span class="color-fg-default text-bold mr-1">Max</span> <span>0.4%</span> </a> </li> </ul> 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0ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path> </svg> <button type="button" class="flash-close js-ajax-error-dismiss" aria-label="Dismiss error"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x"> <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path> </svg> </button> You can’t perform that action at this time. </div> <template id="site-details-dialog"> <details class="details-reset details-overlay details-overlay-dark lh-default color-fg-default hx_rsm" open> <summary role="button" aria-label="Close dialog"></summary> <details-dialog class="Box Box--overlay d-flex flex-column anim-fade-in fast hx_rsm-dialog hx_rsm-modal"> <button class="Box-btn-octicon m-0 btn-octicon 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<clipboard-copy aria-label="Copy" class="ClipboardButton btn js-clipboard-copy m-2 p-0" data-copy-feedback="Copied!" data-tooltip-direction="w"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy js-clipboard-copy-icon m-2"> <path d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 0 1 0 1.5h-1.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-1.5a.75.75 0 0 1 1.5 0v1.5A1.75 1.75 0 0 1 9.25 16h-7.5A1.75 1.75 0 0 1 0 14.25Z"></path><path d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0 1 14.25 11h-7.5A1.75 1.75 0 0 1 5 9.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z"></path> </svg> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check js-clipboard-check-icon color-fg-success d-none m-2"> <path d="M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0Z"></path> </svg> </clipboard-copy> </div> </template> <template id="snippet-clipboard-copy-button-unpositioned"> <div class="zeroclipboard-container"> <clipboard-copy aria-label="Copy" class="ClipboardButton btn btn-invisible js-clipboard-copy m-2 p-0 d-flex flex-justify-center flex-items-center" data-copy-feedback="Copied!" data-tooltip-direction="w"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy js-clipboard-copy-icon"> <path d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 0 1 0 1.5h-1.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-1.5a.75.75 0 0 1 1.5 0v1.5A1.75 1.75 0 0 1 9.25 16h-7.5A1.75 1.75 0 0 1 0 14.25Z"></path><path d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0 1 14.25 11h-7.5A1.75 1.75 0 0 1 5 9.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z"></path> </svg> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check js-clipboard-check-icon color-fg-success d-none"> <path d="M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0Z"></path> </svg> </clipboard-copy> </div> </template> </div> <div id="js-global-screen-reader-notice" class="sr-only mt-n1" aria-live="polite" aria-atomic="true" ></div> <div id="js-global-screen-reader-notice-assertive" class="sr-only mt-n1" aria-live="assertive" aria-atomic="true"></div> </body> </html>