{"id":16338,"date":"2026-05-22T13:01:58","date_gmt":"2026-05-22T20:01:58","guid":{"rendered":"https:\/\/mattfife.com\/?p=16338"},"modified":"2026-05-02T13:26:57","modified_gmt":"2026-05-02T20:26:57","slug":"dos-1-0-source-code","status":"publish","type":"post","link":"https:\/\/mattfife.com\/?p=16338","title":{"rendered":"Dos 1.0 source code"},"content":{"rendered":"
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Microsoft has decided to open source DOS 1.0 on the 45th anniversary<\/a>. In 2018, Microsoft open-sourced MS\u2011DOS 1.25 and 2.11<\/a>. In 2024 they made the\u00a0source for MS\u2011DOS 4.0<\/a>\u00a0available to the public as well. On DOS 1.00\u2019s 45th anniversary, Microsoft has released \u00a0the earliest DOS 1.0 source code<\/a>\u00a0discovered to date.<\/p>\n\n\n\n

Check out the Paterson listings<\/a> on github. It has transcription of the listings, original files extracted from printouts of the source.<\/p>\n","protected":false},"excerpt":{"rendered":"

Microsoft has decided to open source DOS 1.0 on the 45th anniversary. In 2018, Microsoft open-sourced MS\u2011DOS 1.25 and 2.11. In 2024 they made the\u00a0source for MS\u2011DOS 4.0\u00a0available to the public as well. On DOS 1.00\u2019s 45th anniversary, Microsoft has released \u00a0the earliest DOS 1.0 source code\u00a0discovered to date. Check out the Paterson listings on github. It has transcription of the listings, original files extracted from printouts of the source.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[9],"tags":[],"class_list":["post-16338","post","type-post","status-publish","format-standard","hentry","category-cool"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p4WECr-4fw","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/mattfife.com\/index.php?rest_route=\/wp\/v2\/posts\/16338","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mattfife.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mattfife.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mattfife.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mattfife.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16338"}],"version-history":[{"count":1,"href":"https:\/\/mattfife.com\/index.php?rest_route=\/wp\/v2\/posts\/16338\/revisions"}],"predecessor-version":[{"id":16340,"href":"https:\/\/mattfife.com\/index.php?rest_route=\/wp\/v2\/posts\/16338\/revisions\/16340"}],"wp:attachment":[{"href":"https:\/\/mattfife.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mattfife.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mattfife.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}