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GitHub - adafruit/pico-mac: Run the popular umac emulator right on your Pi Pico!
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flex-column flex-auto top-0"> <div class="HeaderMenu-wrapper d-flex flex-column flex-self-start flex-lg-row flex-auto rounded rounded-lg-0"> <nav class="HeaderMenu-nav" aria-label="Global"> <ul class="d-lg-flex list-style-none"> <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"> Product <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 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"> <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 pb-lg-3" data-analytics-event="{"location":"navbar","action":"github_copilot","context":"product","tag":"link","label":"github_copilot_link_product_navbar"}" href="https://github.com/features/copilot"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-copilot color-fg-subtle mr-3"> <path d="M23.922 16.992c-.861 1.495-5.859 5.023-11.922 5.023-6.063 0-11.061-3.528-11.922-5.023A.641.641 0 0 1 0 16.736v-2.869a.841.841 0 0 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0-1.14-.243-1.847-.705-2.319-.477-.488-1.319-.862-2.824-1.025-1.487-.161-2.192.138-2.533.529-.269.307-.437.808-.438 1.578v.021c0 .265.021.562.063.893Zm-1.626 0c.042-.331.063-.628.063-.894v-.02c-.001-.77-.169-1.271-.438-1.578-.341-.391-1.046-.69-2.533-.529-1.505.163-2.347.537-2.824 1.025-.462.472-.705 1.179-.705 2.319 0 1.211.175 1.926.558 2.361.365.414 1.084.751 2.657.751 1.21 0 1.902-.394 2.344-.938.475-.584.742-1.44.878-2.497Z"></path><path d="M14.5 14.25a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Zm-5 0a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Z"></path> </svg> <div> <div class="color-fg-default h4">GitHub Copilot</div> Write better code with AI </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"security","context":"product","tag":"link","label":"security_link_product_navbar"}" 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0 0 1 0 1.5h-.5a.75.75 0 0 1-.75-.75Z"></path> </svg> <div> <div class="color-fg-default h4">Codespaces</div> Instant dev environments </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"issues","context":"product","tag":"link","label":"issues_link_product_navbar"}" href="https://github.com/features/issues"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-issue-opened color-fg-subtle mr-3"> <path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1ZM2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12Zm9.5 2a2 2 0 1 1-.001-3.999A2 2 0 0 1 12 14Z"></path> </svg> <div> <div class="color-fg-default h4">Issues</div> Plan and track work </div> </a></li> <li> <a 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width="24" data-view-component="true" class="octicon octicon-code-square color-fg-subtle mr-3"> <path d="M10.3 8.24a.75.75 0 0 1-.04 1.06L7.352 12l2.908 2.7a.75.75 0 1 1-1.02 1.1l-3.5-3.25a.75.75 0 0 1 0-1.1l3.5-3.25a.75.75 0 0 1 1.06.04Zm3.44 1.06a.75.75 0 1 1 1.02-1.1l3.5 3.25a.75.75 0 0 1 0 1.1l-3.5 3.25a.75.75 0 1 1-1.02-1.1l2.908-2.7-2.908-2.7Z"></path><path d="M2 3.75C2 2.784 2.784 2 3.75 2h16.5c.966 0 1.75.784 1.75 1.75v16.5A1.75 1.75 0 0 1 20.25 22H3.75A1.75 1.75 0 0 1 2 20.25Zm1.75-.25a.25.25 0 0 0-.25.25v16.5c0 .138.112.25.25.25h16.5a.25.25 0 0 0 .25-.25V3.75a.25.25 0 0 0-.25-.25Z"></path> </svg> <div> <div class="color-fg-default h4">Code Search</div> Find more, search less </div> </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="product-explore-heading">Explore</span> <ul class="list-style-none f5" 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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":"github_skills","context":"product","tag":"link","label":"github_skills_link_product_navbar"}" href="https://skills.github.com"> GitHub Skills <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 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</div> </modal-dialog></div> </div> <div data-action="click:qbsearch-input#retract" class="dark-backdrop position-fixed" hidden data-target="qbsearch-input.darkBackdrop"></div> <div class="color-fg-default"> <dialog-helper> <dialog data-target="qbsearch-input.feedbackDialog" data-action="close:qbsearch-input#handleDialogClose cancel:qbsearch-input#handleDialogClose" id="feedback-dialog" aria-modal="true" aria-labelledby="feedback-dialog-title" aria-describedby="feedback-dialog-description" data-view-component="true" class="Overlay Overlay-whenNarrow Overlay--size-medium Overlay--motion-scaleFade Overlay--disableScroll"> <div data-view-component="true" class="Overlay-header"> <div class="Overlay-headerContentWrap"> <div class="Overlay-titleWrap"> <h1 class="Overlay-title " id="feedback-dialog-title"> Provide feedback </h1> </div> <div class="Overlay-actionWrap"> <button data-close-dialog-id="feedback-dialog" aria-label="Close" type="button" data-view-component="true" class="close-button 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seriously.</p> <textarea name="feedback" class="form-control width-full mb-2" style="height: 120px" id="feedback"></textarea> <input name="include_email" id="include_email" aria-label="Include my email address so I can be contacted" class="form-control mr-2" type="checkbox"> <label for="include_email" style="font-weight: normal">Include my email address so I can be contacted</label> </form></div> </scrollable-region> <div data-view-component="true" class="Overlay-footer Overlay-footer--alignEnd"> <button data-close-dialog-id="feedback-dialog" type="button" data-view-component="true" class="btn"> Cancel </button> <button form="code-search-feedback-form" data-action="click:qbsearch-input#submitFeedback" type="submit" data-view-component="true" class="btn-primary btn"> Submit feedback </button> </div> </dialog></dialog-helper> <custom-scopes data-target="qbsearch-input.customScopesManager"> <dialog-helper> <dialog data-target="custom-scopes.customScopesModalDialog" data-action="close:qbsearch-input#handleDialogClose cancel:qbsearch-input#handleDialogClose" id="custom-scopes-dialog" aria-modal="true" aria-labelledby="custom-scopes-dialog-title" aria-describedby="custom-scopes-dialog-description" data-view-component="true" class="Overlay Overlay-whenNarrow Overlay--size-medium Overlay--motion-scaleFade Overlay--disableScroll"> <div data-view-component="true" class="Overlay-header Overlay-header--divided"> <div class="Overlay-headerContentWrap"> <div class="Overlay-titleWrap"> <h1 class="Overlay-title " id="custom-scopes-dialog-title"> Saved searches </h1> <h2 id="custom-scopes-dialog-description" class="Overlay-description">Use saved searches to filter your results more quickly</h2> </div> <div class="Overlay-actionWrap"> <button data-close-dialog-id="custom-scopes-dialog" aria-label="Close" type="button" data-view-component="true" class="close-button Overlay-closeButton"><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> </div> </div> </div> <scrollable-region data-labelled-by="custom-scopes-dialog-title"> <div data-view-component="true" class="Overlay-body"> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <div hidden class="create-custom-scope-form" 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="D+9h4n1LyHc+m2alWefCuMgoTKrt4VwtHzPUSUvO2ek/5SL82RwqarDbumOacESZ7XF7jMlUEFqPwuDEJKQu3Q==" /> <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="SPNFHFNW0QrawQYXwxdNOzrDwwnFYzIG5ZBd41WguIdwf4i9lMe/hq36CQs3aQXeA+eDDN14S3A0U/cbN5B5HQ==" /> </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" 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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 data-view-component="true" class="d-inline"> Star </span> <span id="repo-stars-counter-star" aria-label="10 users starred this repository" data-singular-suffix="user starred this repository" data-plural-suffix="users starred this repository" data-turbo-replace="true" title="10" data-view-component="true" class="Counter js-social-count">10</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 "> Run the popular umac emulator right on your Pi Pico! </p> <div class="mb-3"> <a class="Link--secondary no-underline mr-3" 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data-target="react-partial.embeddedData">{"props":{"initialPayload":{"allShortcutsEnabled":false,"path":"/","repo":{"id":947541020,"defaultBranch":"main","name":"pico-mac","ownerLogin":"adafruit","currentUserCanPush":false,"isFork":true,"isEmpty":false,"createdAt":"2025-03-12T21:15:33.000Z","ownerAvatar":"https://avatars.githubusercontent.com/u/181069?v=4","public":true,"private":false,"isOrgOwned":true},"currentUser":null,"refInfo":{"name":"main","listCacheKey":"v0:1743174200.0","canEdit":false,"refType":"branch","currentOid":"1b8203677f8d3f33e25f13c471d547032b61736f"},"tree":{"items":[{"name":".github/workflows","path":".github/workflows","contentType":"directory","hasSimplifiedPath":true},{"name":"external","path":"external","contentType":"directory"},{"name":"include","path":"include","contentType":"directory"},{"name":"lib","path":"lib","contentType":"directory"},{"name":"src","path":"src","contentType":"directory"},{"name":".gitignore","path":".gitignore","contentType":"file"},{"name":".gitmodules","path":".gitmodules","contentType":"file"},{"name":"CMakeLists.txt","path":"CMakeLists.txt","contentType":"file"},{"name":"README.md","path":"README.md","contentType":"file"},{"name":"fetch-rom-dsk.sh","path":"fetch-rom-dsk.sh","contentType":"file"},{"name":"fruitjam-build.sh","path":"fruitjam-build.sh","contentType":"file"},{"name":"pico_sdk_import.cmake","path":"pico_sdk_import.cmake","contentType":"file"}],"templateDirectorySuggestionUrl":null,"readme":null,"totalCount":12,"showBranchInfobar":true},"fileTree":null,"fileTreeProcessingTime":null,"foldersToFetch":[],"treeExpanded":false,"symbolsExpanded":false,"isOverview":true,"overview":{"banners":{"shouldRecommendReadme":false,"isPersonalRepo":false,"showUseActionBanner":false,"actionSlug":null,"actionId":null,"showProtectBranchBanner":false,"publishBannersInfo":{"dismissActionNoticePath":"/settings/dismiss-notice/publish_action_from_repo","releasePath":"/adafruit/pico-mac/releases/new?marketplace=true","showPublishActionBanner":false},"interactionLimitBanner":null,"showInvitationBanner":false,"inviterName":null,"actionsMigrationBannerInfo":{"releaseTags":[],"showImmutableActionsMigrationBanner":false,"initialMigrationStatus":null}},"codeButton":{"contactPath":"/contact","isEnterprise":false,"local":{"protocolInfo":{"httpAvailable":true,"sshAvailable":null,"httpUrl":"https://github.com/adafruit/pico-mac.git","showCloneWarning":null,"sshUrl":null,"sshCertificatesRequired":null,"sshCertificatesAvailable":null,"ghCliUrl":"gh repo clone adafruit/pico-mac","defaultProtocol":"http","newSshKeyUrl":"/settings/ssh/new","setProtocolPath":"/users/set_protocol"},"platformInfo":{"cloneUrl":"https://desktop.github.com","showVisualStudioCloneButton":false,"visualStudioCloneUrl":"https://windows.github.com","showXcodeCloneButton":false,"xcodeCloneUrl":"xcode://clone?repo=https%3A%2F%2Fgithub.com%2Fadafruit%2Fpico-mac","zipballUrl":"/adafruit/pico-mac/archive/refs/heads/main.zip"}},"newCodespacePath":"/codespaces/new?hide_repo_select=true\u0026repo=947541020"},"popovers":{"rename":null,"renamedParentRepo":null},"commitCount":"91","overviewFiles":[{"displayName":"README.md","repoName":"pico-mac","refName":"main","path":"README.md","preferredFileType":"readme","tabName":"README","richText":"\u003carticle class=\"markdown-body entry-content container-lg\" itemprop=\"text\"\u003e\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePico Micro Mac (pico-umac)\u003c/h1\u003e\u003ca id=\"user-content-pico-micro-mac-pico-umac\" class=\"anchor\" aria-label=\"Permalink: Pico Micro Mac (pico-umac)\" href=\"#pico-micro-mac-pico-umac\"\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\"\u003ev0.21-fruitjam 28 March 2025\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eI (@jepler) have run roughshod across the code, breaking things willy-nilly and adding\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e512x342 \u0026amp; 640x480 digital output on HSTX\u003c/li\u003e\n\u003cli\u003ePIO USB\u003c/li\u003e\n\u003cli\u003ePSRAM support\u003c/li\u003e\n\u003cli\u003eSome Sound support on the onboard I2S DAC (speaker and headphones)\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eSeveral pre-compiled variants are offered:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e400kB or 4096kB (the latter uses PSRAM, and may perform slower overall but can run more software)\u003c/li\u003e\n\u003cli\u003e512x342 or 640x480 desktop resolution (512x342 is more compatible but has black screen margins)\u003c/li\u003e\n\u003cli\u003eoverclocked or not (overclocked may run faster but may be less reliable)\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eWhat works?\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eSystem beep\u003c/li\u003e\n\u003cli\u003eDark Castle including audio\u003c/li\u003e\n\u003cli\u003eAfter Dark screensavers including audio\u003c/li\u003e\n\u003cli\u003eGlider works, but without sound\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eWhat doesn't work?\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eHypercard \"play\" and some hypercard screen transitions\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eSome of the software I tested with:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://archive.org/details/HyperCardBootSystem7\" rel=\"nofollow\"\u003ehttps://archive.org/details/HyperCardBootSystem7\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://archive.org/details/mac%5C_DarkCastle%5C_1%5C_2\" rel=\"nofollow\"\u003ehttps://archive.org/details/mac\\_DarkCastle\\_1\\_2\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://archive.org/details/AfterDark2\" rel=\"nofollow\"\u003ehttps://archive.org/details/AfterDark2\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003ePlug mouse \u0026amp; keyboard into the USB ports of the fruit jam.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003ePut the software (a mac HFS volume with no additional headers or metadata) on a\nSD card as \"umac0w.img\" (if you want to be able to write files) or\n\"umac0ro.img\" (if you want the drive to be read only) and press the reset\nbutton to start.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eImportant note on overclocking:\u003c/strong\u003e The \"oc\" uf2 files overclock your RP2 chip to 264MHz. Simply including the \u003ccode\u003e\u0026lt;Adafruit_dvhstx.h\u0026gt;\u003c/code\u003e header enables this overclocking, separate from the option in the Arduino Tools menu.\nJust like PC overclocking, there’s some risk of reduced component lifespan, though the extent (if any) can’t be precisely quantified and could vary from one chip to another.\nProceed at your own discretion.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003ev0.21 20 December 2024\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThis project embeds the \u003ca href=\"https://github.com/evansm7/umac\"\u003eumac Mac 128K\nemulator\u003c/a\u003e project into a Raspberry Pi\nPico microcontroller. At long last, the worst Macintosh in a cheap,\nportable form factor!\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIt has features, many features, the best features:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eOutputs VGA 640x480@60Hz, monochrome, using three resistors\u003c/li\u003e\n\u003cli\u003eUSB HID keyboard and mouse\u003c/li\u003e\n\u003cli\u003eRead-only disc image in flash (your creations are ephemeral, like life itself)\u003c/li\u003e\n\u003cli\u003eOr, if you have a hard time letting go, support for rewritable\ndisc storage on an SPI-attached SD card\u003c/li\u003e\n\u003cli\u003eMac 128K by default, or you can make use of more of the Pico's\nmemory and run as a \u003cem\u003eMac 208K\u003c/em\u003e\u003c/li\u003e\n\u003cli\u003eSince you now have more memory, you can splash out on more\nscreen real-estate, and use 640x480 resolution!\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eGreat features. It even doesn't hang at random! (Anymore.)\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe \u003cem\u003eMac 208K\u003c/em\u003e was, of course, never a real machine. But, \u003cem\u003eumac\u003c/em\u003e\nsupports odd-sized memories, and more memory runs more things. A\nsurprising amount of software runs on the 128K config, but if you need\nto run \u003cem\u003eMacPaint\u003c/em\u003e specifically then you'll need to build both SD\nstorage in addition to the \u003cem\u003eMac 208K\u003c/em\u003e config.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eSo anyway, you can build this project yourself for less than the cost\nof a beer! You'll need at least a RPi Pico board, a VGA monitor (or\nVGA-HDMI adapter), a USB mouse (and maybe a USB keyboard/hub), plus a\ncouple of cheap components.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBuild\u003c/h1\u003e\u003ca id=\"user-content-build\" class=\"anchor\" aria-label=\"Permalink: Build\" href=\"#build\"\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\"\u003ePrerequisites/essentials\u003c/h2\u003e\u003ca id=\"user-content-prerequisitesessentials\" class=\"anchor\" aria-label=\"Permalink: Prerequisites/essentials\" href=\"#prerequisitesessentials\"\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\u003egit submodules\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eClone the repo with \u003ccode\u003e--recursive\u003c/code\u003e, or \u003ccode\u003egit submodule update --init --recursive\u003c/code\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003eInstall/set up the \u003ca href=\"https://github.com/raspberrypi/pico-sdk\"\u003ePico/RP2040 SDK\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eGet a ROM \u0026amp; disc image with \u003ccode\u003esh fetch-rom-dsk.sh\u003c/code\u003e (needs curl \u0026amp; 7z (debian package p7zip-full))\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBuild pico-umac\u003c/h2\u003e\u003ca id=\"user-content-build-pico-umac\" class=\"anchor\" aria-label=\"Permalink: Build pico-umac\" href=\"#build-pico-umac\"\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\"\u003eRun the configure-and-build script:\u003c/p\u003e\n\u003cdiv class=\"snippet-clipboard-content notranslate position-relative overflow-auto\" data-snippet-clipboard-copy-content=\"$ ./fruitjam-build.sh -h\nUsage: ./fruitjam-build.sh [-v] [-m KiB] [-d diskimage]\n\n -v: Use framebuffer resolution 640x480 instead of 512x342\n -m: Set memory size in KiB (over 400kB requires psram)\n -d: Specify disc image to include\n -o: Overclock to 264MHz (known to be incompatible with psram)\n\nPSRAM is automatically set depending on memory \u0026amp; framebuffer details\"\u003e\u003cpre class=\"notranslate\"\u003e\u003ccode\u003e$ ./fruitjam-build.sh -h\nUsage: ./fruitjam-build.sh [-v] [-m KiB] [-d diskimage]\n\n -v: Use framebuffer resolution 640x480 instead of 512x342\n -m: Set memory size in KiB (over 400kB requires psram)\n -d: Specify disc image to include\n -o: Overclock to 264MHz (known to be incompatible with psram)\n\nPSRAM is automatically set depending on memory \u0026amp; framebuffer details\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\"\u003eDisc image\u003c/h2\u003e\u003ca id=\"user-content-disc-image\" class=\"anchor\" aria-label=\"Permalink: Disc image\" href=\"#disc-image\"\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 don't build SD support, an internal read-only disc image is\nstored in flash. If you do build SD support, you have the option to\nstill include an image in flash, and this is used as a fallback if\nSD boot fails.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eGrab a Macintosh system disc from somewhere. A 400K or 800K floppy\nimage works just fine, up to System 3.2 (the last version to support\nMac128Ks). I've used images from\n\u003ca href=\"https://winworldpc.com/product/mac-os-0-6/system-3x\" rel=\"nofollow\"\u003ehttps://winworldpc.com/product/mac-os-0-6/system-3x\u003c/a\u003e but also check\nthe various forums and MacintoshRepository. See the \u003ccode\u003eumac\u003c/code\u003e README for\ninfo on formats (it needs to be raw data without header).\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe image size can be whatever you have space for in flash (typically\nabout 1.3MB is free there), or on the SD card. (I don't know what the\nHFS limits are. But if you make a 50MB disc you're unlikely to fill\nit with software that actually works on the \u003cem\u003eMac 128K\u003c/em\u003e :) )\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf using an SD card, use a FAT-formatted card and copy your disc image\ninto \u003cem\u003eone\u003c/em\u003e of the following files in the root of the card:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ccode\u003eumac0.img\u003c/code\u003e: A normal read/write disc image\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eumac0ro.img\u003c/code\u003e: A read-only disc image\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eSoftware\u003c/h1\u003e\u003ca id=\"user-content-software\" class=\"anchor\" aria-label=\"Permalink: Software\" href=\"#software\"\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\"\u003eBoth CPU cores are used, and are optionally overclocked (blush) to 264MHz so that\nMissile Command is enjoyable to play.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe \u003ccode\u003eumac\u003c/code\u003e emulator and video output runs on core 1, and core 0 deals\nwith USB HID input. Video DMA is initialised pointing to the\nframebuffer in the Mac's RAM, or to a mirrored region in SRAM depending\non the configuration.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eOther than that, it's just a main loop in \u003ccode\u003emain.c\u003c/code\u003e shuffling things\ninto \u003ccode\u003eumac\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eQuite a lot of optimisation has been done in \u003ccode\u003eumac\u003c/code\u003e and \u003ccode\u003eMusashi\u003c/code\u003e to\nget performance up on Cortex-M0+ and the RP2040, like careful location\nof certain routines in RAM, ensuring inlining/constants can be\nfoldeed, etc. It's 5x faster than it was at the beginning.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe top-level project might be a useful framework for other emulators,\nor other projects that need USB HID input and a framebuffer (e.g. a\nVT220 emulator!).\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe USB HID code is largely stolen from the TinyUSB example, but shows\nhow in practice you might capture keypresses/deal with mouse events.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eLicence\u003c/h1\u003e\u003ca id=\"user-content-licence\" class=\"anchor\" aria-label=\"Permalink: Licence\" href=\"#licence\"\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\"\u003e\u003ccode\u003ehid.c\u003c/code\u003e and \u003ccode\u003etusb_config.h\u003c/code\u003e are based on code from the TinyUSB\nproject, which is Copyright (c) 2019, 2021 Ha Thach (tinyusb.org) and\nreleased under the MIT licence. \u003ccode\u003esd_hw_config.c\u003c/code\u003e is based on code\nfrom the no-OS-FatFS-SD-SPI-RPi-Pico project, which is Copyright (c)\n2021 Carl John Kugler III.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe remainder of the code is released under the MIT licence:\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eCopyright (c) 2024 Matt Evans:\u003c/p\u003e\n\u003cp dir=\"auto\"\u003ePermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\u003c/p\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"Pico Micro Mac (pico-umac)","anchor":"pico-micro-mac-pico-umac","htmlText":"Pico Micro Mac (pico-umac)"},{"level":1,"text":"Build","anchor":"build","htmlText":"Build"},{"level":2,"text":"Prerequisites/essentials","anchor":"prerequisitesessentials","htmlText":"Prerequisites/essentials"},{"level":2,"text":"Build pico-umac","anchor":"build-pico-umac","htmlText":"Build pico-umac"},{"level":2,"text":"Disc image","anchor":"disc-image","htmlText":"Disc image"},{"level":1,"text":"Software","anchor":"software","htmlText":"Software"},{"level":1,"text":"Licence","anchor":"licence","htmlText":"Licence"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fadafruit%2Fpico-mac"}}],"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-96e76d5fdb2c.js","githubDevUrl":null,"enabled_features":{"copilot_workspace":null,"code_nav_ui_events":false,"overview_shared_code_dropdown_button":false,"react_blob_overlay":false,"accessible_code_button":true,"github_models_repo_integration":false}}}}</script> <div data-target="react-partial.reactRoot"><style data-styled="true" data-styled-version="5.3.11">.iVEunk{margin-top:16px;margin-bottom:16px;}/*!sc*/ 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0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5Zm0 5h8.5a.75.75 0 0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5Zm0 5h8.5a.75.75 0 0 1 0 1.5h-8.5a.75.75 0 0 1 0-1.5ZM2 14a1 1 0 1 1 0-2 1 1 0 0 1 0 2Zm1-6a1 1 0 1 1-2 0 1 1 0 0 1 2 0ZM2 4a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg></button></div><div class="Box-sc-g0xbh4-0 QkQOb js-snippet-clipboard-copy-unpositioned undefined" data-hpc="true"><article class="markdown-body entry-content container-lg" itemprop="text"><div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Pico Micro Mac (pico-umac)</h1><a id="user-content-pico-micro-mac-pico-umac" class="anchor" aria-label="Permalink: Pico Micro Mac (pico-umac)" href="#pico-micro-mac-pico-umac"><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">v0.21-fruitjam 28 March 2025</p> <p dir="auto">I (@jepler) have run roughshod across the code, breaking things willy-nilly and adding</p> <ul dir="auto"> <li>512x342 & 640x480 digital output on HSTX</li> <li>PIO USB</li> <li>PSRAM support</li> <li>Some Sound support on the onboard I2S DAC (speaker and headphones)</li> </ul> <p dir="auto">Several pre-compiled variants are offered:</p> <ul dir="auto"> <li>400kB or 4096kB (the latter uses PSRAM, and may perform slower overall but can run more software)</li> <li>512x342 or 640x480 desktop resolution (512x342 is more compatible but has black screen margins)</li> <li>overclocked or not (overclocked may run faster but may be less reliable)</li> </ul> <p dir="auto">What works?</p> <ul dir="auto"> <li>System beep</li> <li>Dark Castle including audio</li> <li>After Dark screensavers including audio</li> <li>Glider works, but without sound</li> </ul> <p dir="auto">What doesn't work?</p> <ul dir="auto"> <li>Hypercard "play" and some hypercard screen transitions</li> </ul> <p dir="auto">Some of the software I tested with:</p> <ul dir="auto"> <li><a href="https://archive.org/details/HyperCardBootSystem7" rel="nofollow">https://archive.org/details/HyperCardBootSystem7</a></li> <li><a href="https://archive.org/details/mac%5C_DarkCastle%5C_1%5C_2" rel="nofollow">https://archive.org/details/mac\_DarkCastle\_1\_2</a></li> <li><a href="https://archive.org/details/AfterDark2" rel="nofollow">https://archive.org/details/AfterDark2</a></li> </ul> <p dir="auto">Plug mouse & keyboard into the USB ports of the fruit jam.</p> <p dir="auto">Put the software (a mac HFS volume with no additional headers or metadata) on a SD card as "umac0w.img" (if you want to be able to write files) or "umac0ro.img" (if you want the drive to be read only) and press the reset button to start.</p> <p dir="auto"><strong>Important note on overclocking:</strong> The "oc" uf2 files overclock your RP2 chip to 264MHz. Simply including the <code><Adafruit_dvhstx.h></code> header enables this overclocking, separate from the option in the Arduino Tools menu. Just like PC overclocking, there’s some risk of reduced component lifespan, though the extent (if any) can’t be precisely quantified and could vary from one chip to another. Proceed at your own discretion.</p> <p dir="auto">v0.21 20 December 2024</p> <p dir="auto">This project embeds the <a href="https://github.com/evansm7/umac">umac Mac 128K emulator</a> project into a Raspberry Pi Pico microcontroller. At long last, the worst Macintosh in a cheap, portable form factor!</p> <p dir="auto">It has features, many features, the best features:</p> <ul dir="auto"> <li>Outputs VGA 640x480@60Hz, monochrome, using three resistors</li> <li>USB HID keyboard and mouse</li> <li>Read-only disc image in flash (your creations are ephemeral, like life itself)</li> <li>Or, if you have a hard time letting go, support for rewritable disc storage on an SPI-attached SD card</li> <li>Mac 128K by default, or you can make use of more of the Pico's memory and run as a <em>Mac 208K</em></li> <li>Since you now have more memory, you can splash out on more screen real-estate, and use 640x480 resolution!</li> </ul> <p dir="auto">Great features. It even doesn't hang at random! (Anymore.)</p> <p dir="auto">The <em>Mac 208K</em> was, of course, never a real machine. But, <em>umac</em> supports odd-sized memories, and more memory runs more things. A surprising amount of software runs on the 128K config, but if you need to run <em>MacPaint</em> specifically then you'll need to build both SD storage in addition to the <em>Mac 208K</em> config.</p> <p dir="auto">So anyway, you can build this project yourself for less than the cost of a beer! You'll need at least a RPi Pico board, a VGA monitor (or VGA-HDMI adapter), a USB mouse (and maybe a USB keyboard/hub), plus a couple of cheap components.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Build</h1><a id="user-content-build" class="anchor" aria-label="Permalink: Build" href="#build"><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">Prerequisites/essentials</h2><a id="user-content-prerequisitesessentials" class="anchor" aria-label="Permalink: Prerequisites/essentials" href="#prerequisitesessentials"><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>git submodules <ul dir="auto"> <li>Clone the repo with <code>--recursive</code>, or <code>git submodule update --init --recursive</code></li> </ul> </li> <li>Install/set up the <a href="https://github.com/raspberrypi/pico-sdk">Pico/RP2040 SDK</a></li> <li>Get a ROM & disc image with <code>sh fetch-rom-dsk.sh</code> (needs curl & 7z (debian package p7zip-full))</li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Build pico-umac</h2><a id="user-content-build-pico-umac" class="anchor" aria-label="Permalink: Build pico-umac" href="#build-pico-umac"><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">Run the configure-and-build script:</p> <div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ ./fruitjam-build.sh -h Usage: ./fruitjam-build.sh [-v] [-m KiB] [-d diskimage] -v: Use framebuffer resolution 640x480 instead of 512x342 -m: Set memory size in KiB (over 400kB requires psram) -d: Specify disc image to include -o: Overclock to 264MHz (known to be incompatible with psram) PSRAM is automatically set depending on memory & framebuffer details"><pre class="notranslate"><code>$ ./fruitjam-build.sh -h Usage: ./fruitjam-build.sh [-v] [-m KiB] [-d diskimage] -v: Use framebuffer resolution 640x480 instead of 512x342 -m: Set memory size in KiB (over 400kB requires psram) -d: Specify disc image to include -o: Overclock to 264MHz (known to be incompatible with psram) PSRAM is automatically set depending on memory & framebuffer details </code></pre></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Disc image</h2><a id="user-content-disc-image" class="anchor" aria-label="Permalink: Disc image" href="#disc-image"><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 don't build SD support, an internal read-only disc image is stored in flash. If you do build SD support, you have the option to still include an image in flash, and this is used as a fallback if SD boot fails.</p> <p dir="auto">Grab a Macintosh system disc from somewhere. A 400K or 800K floppy image works just fine, up to System 3.2 (the last version to support Mac128Ks). I've used images from <a href="https://winworldpc.com/product/mac-os-0-6/system-3x" rel="nofollow">https://winworldpc.com/product/mac-os-0-6/system-3x</a> but also check the various forums and MacintoshRepository. See the <code>umac</code> README for info on formats (it needs to be raw data without header).</p> <p dir="auto">The image size can be whatever you have space for in flash (typically about 1.3MB is free there), or on the SD card. (I don't know what the HFS limits are. But if you make a 50MB disc you're unlikely to fill it with software that actually works on the <em>Mac 128K</em> :) )</p> <p dir="auto">If using an SD card, use a FAT-formatted card and copy your disc image into <em>one</em> of the following files in the root of the card:</p> <ul dir="auto"> <li><code>umac0.img</code>: A normal read/write disc image</li> <li><code>umac0ro.img</code>: A read-only disc image</li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Software</h1><a id="user-content-software" class="anchor" aria-label="Permalink: Software" href="#software"><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">Both CPU cores are used, and are optionally overclocked (blush) to 264MHz so that Missile Command is enjoyable to play.</p> <p dir="auto">The <code>umac</code> emulator and video output runs on core 1, and core 0 deals with USB HID input. Video DMA is initialised pointing to the framebuffer in the Mac's RAM, or to a mirrored region in SRAM depending on the configuration.</p> <p dir="auto">Other than that, it's just a main loop in <code>main.c</code> shuffling things into <code>umac</code>.</p> <p dir="auto">Quite a lot of optimisation has been done in <code>umac</code> and <code>Musashi</code> to get performance up on Cortex-M0+ and the RP2040, like careful location of certain routines in RAM, ensuring inlining/constants can be foldeed, etc. It's 5x faster than it was at the beginning.</p> <p dir="auto">The top-level project might be a useful framework for other emulators, or other projects that need USB HID input and a framebuffer (e.g. a VT220 emulator!).</p> <p dir="auto">The USB HID code is largely stolen from the TinyUSB example, but shows how in practice you might capture keypresses/deal with mouse events.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Licence</h1><a id="user-content-licence" class="anchor" aria-label="Permalink: Licence" href="#licence"><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"><code>hid.c</code> and <code>tusb_config.h</code> are based on code from the TinyUSB project, which is Copyright (c) 2019, 2021 Ha Thach (tinyusb.org) and released under the MIT licence. <code>sd_hw_config.c</code> is based on code from the no-OS-FatFS-SD-SPI-RPi-Pico project, which is Copyright (c) 2021 Carl John Kugler III.</p> <p dir="auto">The remainder of the code is released under the MIT licence:</p> <p dir="auto">Copyright (c) 2024 Matt Evans:</p> <p dir="auto">Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:</p> <p dir="auto">The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.</p> <p dir="auto">THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</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="sIve8aX+8304cxiOGHCdER4hCw+SelxbqvPiojibRrOFPwKgnztTnIAZi64Ljy0bD+VfzWqcRHiNZpToJSe2Zw==" /> </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"> Run the popular umac emulator right on your Pi Pico! </p> <h3 class="sr-only">Resources</h3> <div class="mt-2"> <a class="Link--muted" 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<strong>2</strong> watching</a> </div> <h3 class="sr-only">Forks</h3> <div class="mt-2"> <a href="/adafruit/pico-mac/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>2</strong> forks</a> </div> <div class="mt-2"> <a class="Link--muted" href="/contact/report-content?content_url=https%3A%2F%2Fgithub.com%2Fadafruit%2Fpico-mac&report=adafruit+%28user%29"> Report repository </a> </div> </div> </div> </div> <div class="BorderGrid-row"> <div 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class="color-fg-muted">tags</span> </a> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3"> <a href="/orgs/adafruit/packages?repo_name=pico-mac" 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="text-small color-fg-muted" > No packages published <br> </div> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3">Languages</h2> <div class="mb-2"> <span data-view-component="true" class="Progress"> <span style="background-color:#555555 !important;;width: 85.3%;" itemprop="keywords" data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> <span style="background-color:#DA3434 !important;;width: 11.4%;" itemprop="keywords" data-view-component="true" class="Progress-item color-bg-success-emphasis"></span> <span style="background-color:#89e051 !important;;width: 3.3%;" 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"> <span class="d-inline-flex flex-items-center flex-nowrap text-small mr-3"> <svg style="color:#555555;" 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">C</span> <span>85.3%</span> </span> </li> <li class="d-inline"> <span class="d-inline-flex flex-items-center flex-nowrap text-small mr-3"> <svg style="color:#DA3434;" 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">CMake</span> <span>11.4%</span> </span> </li> <li class="d-inline"> <span class="d-inline-flex flex-items-center flex-nowrap text-small mr-3"> <svg style="color:#89e051;" 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">Shell</span> <span>3.3%</span> </span> </li> </ul> </div> </div> </div> </div> </div></div> </div> </div> </turbo-frame> </main> </div> </div> <footer class="footer pt-8 pb-6 f6 color-fg-muted p-responsive" role="contentinfo" > <h2 class='sr-only'>Footer</h2> <div class="d-flex flex-justify-center flex-items-center flex-column-reverse flex-lg-row flex-wrap flex-lg-nowrap"> <div class="d-flex flex-items-center flex-shrink-0 mx-2"> <a aria-label="Homepage" title="GitHub" class="footer-octicon mr-2" href="https://github.com"> <svg aria-hidden="true" height="24" viewBox="0 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