{"id":2630,"date":"2020-04-21T09:12:14","date_gmt":"2020-04-21T08:12:14","guid":{"rendered":"http:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/?p=2630"},"modified":"2026-01-08T21:44:55","modified_gmt":"2026-01-08T20:44:55","slug":"a2090a","status":"publish","type":"post","link":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/2020\/04\/21\/a2090a\/","title":{"rendered":"A2090A | JA0014294"},"content":{"rendered":"<p><strong>A2090A<\/strong><\/p>\n<p>Serial: JA0014294<\/p>\n<table class=\"basedata\">\n<tbody>\n<tr valign=\"top\">\n<td>\n<div class=\"th\">Company<\/div>\n<p>Commodore, USA<\/td>\n<td>\n<div class=\"th\">Date<\/div>\n<p>1988<\/td>\n<td nowrap=\"nowrap\">\n<div class=\"th\">Amiga<\/div>\n<p>A2000, A3000, A4000<\/td>\n<td nowrap=\"nowrap\">\n<div class=\"th\">Interface<\/div>\n<p>Zorro II<\/td>\n<td nowrap=\"nowrap\">\n<div class=\"th\">Autoconfig ID<\/div>\n<p>514 \/ 1<br \/>\n515 \/ 3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"description\">\n<p><i>SCSI and ST-506 controller<\/i><\/p>\n<ul>\n<li>supports seven SCSI and two ST-506 devices at once<\/li>\n<li>the SCSI drives are controlled by the WD 33C93 IC<\/li>\n<li>the ST-506 drives are controlled by the Zilog Z80B CPU<\/li>\n<li>the 33C93 chip can be controlled by either the 68000 (default) or by the Z80<\/li>\n<li>DMA transfers are provided by the custom Commodore 8727 IC featuring a 64 byte FIFO buffer<\/li>\n<li>the Z80 CPU has 2 kB RAM to buffer commands from the Amiga, 8 kB PROM with driver routines and 1 kB RAM for storage of variables<\/li>\n<li>three autoboot ROMs<\/li>\n<li>custom bootblock design<\/li>\n<li>does not support the SCSI Direct protocol<\/li>\n<li>does not support partitions and drives larger than 256 MB<\/li>\n<li>the ST-506 interface does not support 16-head drives<\/li>\n<li>50 pin internal SCSI connector<\/li>\n<li>DB25 external connector<\/li>\n<li>hard disk activity LED connector<\/li>\n<li>on Zorro III machines the card only works if the driver and all the buffers are loaded into chip RAM<\/li>\n<li>A-Max II driver (hddisk.amhd)<\/li>\n<\/ul>\n<p><i>hard disk kits<\/i><\/p>\n<ul>\n<li>the A2090A was sold in kit form which included the controller itself, a hard disk, cables, installation disk and manual<\/li>\n<li>A2092: A2090A bundled with a 20 MB Miniscribe 8425 hard disk<\/li>\n<li>A2094: A2090A bundled with a 45 MB Toshiba MK-134FA or a 46 MB Rodime RO-3055 hard disk<\/li>\n<li>all of these hard disks are ST-506 drives<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2024\/02\/A2090A-DI.zip\">drivers &amp; installation<\/a><\/p>\n<p>installed in: <a href=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/2020\/04\/04\/amiga-2000hd\/\">A2000HD<\/a><\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 33%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div data-carousel-extra='{\"blog_id\":1,\"permalink\":\"https:\\\/\\\/www.intexsound.de\\\/Commodore-Museum-Mannheim\\\/2020\\\/04\\\/21\\\/a2090a\\\/\",\"likes_blog_id\":false}' id='gallery-1' class='gallery galleryid-2630 gallery-columns-3 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/20200322_150823\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2020\/03\/20200322_150823-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" data-attachment-id=\"2431\" data-orig-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2020\/03\/20200322_150823.jpg\" data-orig-size=\"4032,2268\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;2.4&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;SM-G965F&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1584889703&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;6&quot;,&quot;iso&quot;:&quot;160&quot;,&quot;shutter_speed&quot;:&quot;0.05&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;,&quot;keywords&quot;:&quot;Array&quot;}\" data-image-title=\"20200322_150823\" data-image-description=\"\" data-medium-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2020\/03\/20200322_150823-300x169.jpg\" data-large-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2020\/03\/20200322_150823-1024x576.jpg\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/20200322_150858\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2020\/03\/20200322_150858-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" data-attachment-id=\"2432\" data-orig-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2020\/03\/20200322_150858.jpg\" data-orig-size=\"4032,2268\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;2.4&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;SM-G965F&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1584889738&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;6&quot;,&quot;iso&quot;:&quot;200&quot;,&quot;shutter_speed&quot;:&quot;0.058823529411765&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;,&quot;keywords&quot;:&quot;Array&quot;}\" data-image-title=\"20200322_150858\" data-image-description=\"\" data-medium-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2020\/03\/20200322_150858-300x169.jpg\" data-large-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2020\/03\/20200322_150858-1024x576.jpg\" \/><\/a>\n\t\t\t<\/dt><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A2090A Serial: JA0014294 Company Commodore, USA Date 1988 Amiga A2000, A3000, A4000 Interface Zorro II Autoconfig ID 514 \/ 1 515 \/ 3 SCSI and ST-506 controller supports seven SCSI and two ST-506 devices at once the SCSI drives are controlled by the WD 33C93 IC the ST-506 drives are controlled by the Zilog Z80B [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2431,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[54],"tags":[],"class_list":["post-2630","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amiga-zorro-cards"],"_links":{"self":[{"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/posts\/2630","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=2630"}],"version-history":[{"count":0,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/posts\/2630\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/media\/2431"}],"wp:attachment":[{"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/media?parent=2630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/categories?post=2630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/tags?post=2630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}