{"id":601,"date":"2019-03-31T12:37:51","date_gmt":"2019-03-31T19:37:51","guid":{"rendered":"https:\/\/www.andersknelson.com\/blog\/?p=601"},"modified":"2019-04-02T15:27:17","modified_gmt":"2019-04-02T22:27:17","slug":"ibm-6360","status":"publish","type":"post","link":"https:\/\/www.andersknelson.com\/blog\/?p=601","title":{"rendered":"IBM 6360"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">External 1.2MB 8&#8243; floppy disk drive<\/h3>\n\n\n\n<p>Abstract:<\/p>\n\n\n\n<p>I have a weird obsession with ancient storage media, so I bought a 8&#8243; floppy disk drive built in 1983 and a pack of disks. I wanted the ability to read and write these ridiculous floppies but I wasn&#8217;t interested in buying a huge IBM Displaywriter to go with it. <\/p>\n\n\n\n<p>This project is a low-level controller for the IBM 6360 with a USB interface.<\/p>\n\n\n\n<ul class=\"wp-block-gallery columns-3 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-front-1024x768.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-front-1024x768.jpg\" alt=\"\" data-id=\"608\" data-link=\"https:\/\/www.andersknelson.com\/blog\/?attachment_id=608\" class=\"wp-image-608\" srcset=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-front-1024x768.jpg 1024w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-front-300x225.jpg 300w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-front-768x576.jpg 768w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-front.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-rear-1024x768.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-rear-1024x768.jpg\" alt=\"\" data-id=\"609\" data-link=\"https:\/\/www.andersknelson.com\/blog\/?attachment_id=609\" class=\"wp-image-609\" srcset=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-rear-1024x768.jpg 1024w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-rear-300x225.jpg 300w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-rear-768x576.jpg 768w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-rear.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-23.10__18836.1490275888-1024x768.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-23.10__18836.1490275888-1024x768.jpg\" alt=\"\" data-id=\"607\" data-link=\"https:\/\/www.andersknelson.com\/blog\/?attachment_id=607#main\" class=\"wp-image-607\" srcset=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-23.10__18836.1490275888-1024x768.jpg 1024w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-23.10__18836.1490275888-300x225.jpg 300w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-23.10__18836.1490275888-768x576.jpg 768w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-23.10__18836.1490275888.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-logo-1024x768.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-logo-1024x768.jpg\" alt=\"\" data-id=\"610\" data-link=\"https:\/\/www.andersknelson.com\/blog\/?attachment_id=610\" class=\"wp-image-610\" srcset=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-logo-1024x768.jpg 1024w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-logo-300x225.jpg 300w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-logo-768x576.jpg 768w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-logo.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-24.10__36304.1490275891-1024x768.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-24.10__36304.1490275891-1024x768.jpg\" alt=\"\" data-id=\"606\" data-link=\"https:\/\/www.andersknelson.com\/blog\/?attachment_id=606#main\" class=\"wp-image-606\" srcset=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-24.10__36304.1490275891-1024x768.jpg 1024w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-24.10__36304.1490275891-300x225.jpg 300w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-24.10__36304.1490275891-768x576.jpg 768w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/ibm-6360-dual-8-inch-external-floppy-drives-pn-4240516-24.10__36304.1490275891.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/Close-up_Display_Writer-1024x952.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"952\" src=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/Close-up_Display_Writer-1024x952.jpg\" alt=\"\" data-id=\"605\" data-link=\"https:\/\/www.andersknelson.com\/blog\/?attachment_id=605#main\" class=\"wp-image-605\" srcset=\"https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/Close-up_Display_Writer-1024x952.jpg 1024w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/Close-up_Display_Writer-300x279.jpg 300w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/Close-up_Display_Writer-768x714.jpg 768w, https:\/\/www.andersknelson.com\/blog\/wp-content\/uploads\/2019\/03\/Close-up_Display_Writer.jpg 1652w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/li><\/ul>\n\n\n\n<table class=\"wp-block-table\"><tbody><tr><td>Signal<\/td><td>Comments<\/td><\/tr><tr><td>Data Bus Bit [0-7]<\/td><td>Typical 8-bit data bus.<\/td><\/tr><tr><td>Address Bit [1-4, 8]<\/td><td>Each disk has 77 tracks. Each track has 26 sectors of 128 bytes each. 5 address bits can locate 32 indices &#8211; perhaps these are registers in the onboard disk controller? <\/td><\/tr><tr><td>DMA [Request, Acknowledge, Request transmit, Request receive, Acknowledge transmit, Acknowledge receive]<\/td><td>Perhaps there are 3 stages:<br>1. A DMA write (transmit) or read (receive) is requested by the host.<br>2. The DMA action is acknowledged by the disk controller.<br>3. A data block is contiguously sent from either the host or the drive.<br>4. The DMA request line is deasserted.<\/td><\/tr><tr><td>Interrupt [1, 4, 7]<\/td><td>WTF<\/td><\/tr><tr><td>Diskette Select<\/td><td><\/td><\/tr><tr><td>Diskette Ready<\/td><td><\/td><\/tr><tr><td>I\/O Read<\/td><td><\/td><\/tr><tr><td>I\/O Write<\/td><td><\/td><\/tr><tr><td>Terminal Count<\/td><td><\/td><\/tr><tr><td>Select<\/td><td>Side select?<\/td><\/tr><tr><td>Reset<\/td><td>Obvi.<\/td><\/tr><\/tbody><\/table>\n\n\n\n<p>Resources:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/hackaday.com\/2017\/01\/22\/an-eight-inch-floppy-for-your-retrocomputer\/\">https:\/\/hackaday.com\/2017\/01\/22\/an-eight-inch-floppy-for-your-retrocomputer\/<\/a><\/li><li>http:\/\/www.smbaker.com\/qume-842-8-floppy-drive-with-a-rc2014-z80-retrocomputer<\/li><li>http:\/\/bitsavers.trailing-edge.com\/pdf\/ibm\/6580_Displaywriter\/<\/li><li>https:\/\/www.youtube.com\/watch?v=mlRQAzzwzPA<\/li><li>https:\/\/www.digikey.com\/short\/pqrdcj<\/li><li>https:\/\/github.com\/roybaer\/usb_floppy_adapter<\/li><li>https:\/\/hackaday.com\/tag\/floppy\/<\/li><li>http:\/\/hxc2001.free.fr\/floppy_drive_emulator\/<\/li><li><a href=\"https:\/\/www.digikey.com\/products\/en\/connectors-interconnects\/d-sub-connectors\/439?k=DB37&amp;k=&amp;pkeyword=DB37&amp;sv=0&amp;pv589=25&amp;sf=1&amp;FV=ffe001b7%2C1140050&amp;quantity=&amp;ColumnSort=1000011&amp;page=1&amp;stock=1&amp;pageSize=25\">https:\/\/www.digikey.com\/products\/en\/connectors-interconnects\/d-sub-connectors\/439?k=DB37&amp;k=&amp;pkeyword=DB37&amp;sv=0&amp;pv589=25&amp;sf=1&amp;FV=ffe001b7%2C1140050&amp;quantity=&amp;ColumnSort=1000011&amp;page=1&amp;stock=1&amp;pageSize=25<\/a><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>External 1.2MB 8&#8243; floppy disk drive Abstract: I have a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":608,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38,2],"tags":[],"class_list":["post-601","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-concept","category-projects"],"_links":{"self":[{"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/601","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=601"}],"version-history":[{"count":11,"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/601\/revisions"}],"predecessor-version":[{"id":619,"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/601\/revisions\/619"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=\/wp\/v2\/media\/608"}],"wp:attachment":[{"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.andersknelson.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}