{"id":3132,"date":"2020-05-17T10:19:03","date_gmt":"2020-05-17T09:19:03","guid":{"rendered":"http:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/?p=3132"},"modified":"2022-07-28T11:08:10","modified_gmt":"2022-07-28T10:08:10","slug":"1581","status":"publish","type":"post","link":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/2020\/05\/17\/1581\/","title":{"rendered":"1581"},"content":{"rendered":"<p><strong>1581<\/strong><\/p>\n<p>A 3\u00bd-inch double-sided double-density floppy disk drive released by CBM in 1987, primarily for its C64 and C128 home\/personal computers. It stores 800 kB using MFM encoding<sup id=\"cite_ref-dd81_4-1\" class=\"reference\"><\/sup>\u00a0but formats different from the\u00a0MS-DOS\u00a0(720 kB),\u00a0Amiga\u00a0(880 kB), and\u00a0Mac Plus (800 kB) formats. With special software it is possible to read C1581 disks on an x86 PC system, and likewise, read MS-DOS and other formats of disks in the C1581 (using Big Blue Reader). It is possible to create &#8220;sub-directories&#8221;, which in fact are logical partitions with a fixed size.<\/p>\n<p>This unit here comes in its original box with all the accessories that came with it.<\/p>\n<p>Serial: xxxx???<\/p>\n<ul>\n<li><strong>Type:<\/strong>\u00a0Floppy disk drive<\/li>\n<li><strong>Release date:<\/strong> 1987<\/li>\n<li><strong>Introductory price:<\/strong> USD 399 (1987) USD 1,000 (2022 equivalent)<\/li>\n<li><strong>Discontinued:<\/strong> 1990<\/li>\n<li><strong>Media:<\/strong> 3\u00bd&#8221;\u00a0floppy disk\u00a0DS<sup id=\"cite_ref-w81_2-1\" class=\"reference\"><\/sup>\u00a0DD<sup id=\"cite_ref-z81_3-0\" class=\"reference\"><\/sup>\u00a0using\u00a0MFM<\/li>\n<li><strong>Operating System: <\/strong><a title=\"\" href=\"https:\/\/en.wikipedia.org\/wiki\/Commodore_DOS\">CBM DOS 10.0<\/a><sup id=\"cite_ref-z81_3-1\" class=\"reference\"><\/sup><\/li>\n<li><strong>CPU:<\/strong> MOS 6502 @ 2 MHz, WD1770 or WD1772<\/li>\n<li><strong>VIA:<\/strong> 8520A<\/li>\n<li><strong>Memory:<\/strong> 8 kB RAM 32 kB ROM<\/li>\n<li><strong>Storage:<\/strong> 1MB unformatted, 808.960 bytes formatted (3160 blocks free)<\/li>\n<li><strong>Image Layout:<\/strong>\n<ul>\n<li>Directory starts on: T40 S03<\/li>\n<li>Disk Header: T40 S00<\/li>\n<li>BAM: T40 S01<\/li>\n<\/ul>\n<\/li>\n<li><strong>Connectivity:<\/strong> Commodore proprietary serial IEEE-488<sup id=\"cite_ref-arc81_6-0\" class=\"reference\"><\/sup> burst mode with <span class=\"nowrap\">9.000 bytes\/s<\/span><\/li>\n<li><strong>Transfer protocols:<\/strong> Standard and fast serial;\u00a0burst mode; and commands for parallel interface (the latter not used)<\/li>\n<li><strong>Coding:<\/strong> MFM<\/li>\n<li><strong>Format:<\/strong>\n<ul>\n<li>80 tracks<\/li>\n<li>Ten 512 byte sectors per track<\/li>\n<li>20 logical sectors of 256 bytes<\/li>\n<\/ul>\n<\/li>\n<li><strong>Power:<\/strong>\u00a0220V 50Hz<\/li>\n<li><strong>Backward compatibility:<\/strong> Commodore 64<\/li>\n<li><strong>Predecessor:<\/strong> Commodore 1571<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1581 A 3\u00bd-inch double-sided double-density floppy disk drive released by CBM in 1987, primarily for its C64 and C128 home\/personal computers. It stores 800 kB using MFM encoding\u00a0but formats different from the\u00a0MS-DOS\u00a0(720 kB),\u00a0Amiga\u00a0(880 kB), and\u00a0Mac Plus (800 kB) formats. With special software it is possible to read C1581 disks on an x86 PC system, and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3058,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[37],"tags":[],"class_list":["post-3132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-floppy-seriell"],"_links":{"self":[{"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/posts\/3132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/comments?post=3132"}],"version-history":[{"count":0,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/posts\/3132\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/media\/3058"}],"wp:attachment":[{"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/media?parent=3132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/categories?post=3132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/tags?post=3132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}