{"id":9797,"date":"2022-05-18T13:47:26","date_gmt":"2022-05-18T12:47:26","guid":{"rendered":"http:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/?p=9797"},"modified":"2025-02-04T10:50:34","modified_gmt":"2025-02-04T09:50:34","slug":"a2060-arcnet","status":"publish","type":"post","link":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/2022\/05\/18\/a2060-arcnet\/","title":{"rendered":"A2060 Arcnet | 02743"},"content":{"rendered":"<div class=\"expheader\">\n<div class=\"title\">\n<p><strong>A2060<\/strong><\/p>\n<p>Serial: 02743<\/p>\n<\/div>\n<\/div>\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>1990<\/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 \/ 8,9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"description\">\n<p><i>Arcnet interface<\/i><\/p>\n<ul>\n<li>developed from the\u00a0<a href=\"http:\/\/amiga.resource.cx\/exp\/aa2000\">Ameristar Arcnet Controller<\/a><\/li>\n<li>Arcnet networking system &#8211; old, slow but cheap and reliable, useful for small LANs and simple network sharing<\/li>\n<li>Arcnet requires RG62 coaxial cable instead of the RG58 used on Ethernet systems<\/li>\n<li>uses 93 ohm terminators opposed to the 50 ohm used by Ethernet<\/li>\n<li>the Arcnet interface hybrid chip comes in two different versions, HCY 9058 for bus networks and HCY 9068 for star networks\n<ul>\n<li>the manual says the card uses a bus network layout with up to 256 nodes but many A2060s has 9068 hybrids for a star network layout allowing only four cards to be connected together<\/li>\n<li>to solve this the HCY 9068 can be simply replaced with a HCY 9058 chip<\/li>\n<\/ul>\n<\/li>\n<li>interrupt driven (polled I\/O) &#8211; one interrupt on the Amiga yields into a busy system<\/li>\n<li>to reduce traffic the driver uses the Arcnet hardware&#8217;s four buffer as a single FIFO buffer<\/li>\n<li>the badly written driver (a2060.device) has some bugs in the FIFO buffer which results in lost packets and packet collisions &#8211; increased traffic on the Arcnet bus<\/li>\n<li>manual says 2.5 Mbit\/s (300 kB\/s) transfer speed but only max 100 kB\/s is achievable<\/li>\n<li>socket for optional network autoboot ROM<\/li>\n<li>bus activity LED connector<\/li>\n<li>supported by NetBSD and OpenBSD<\/li>\n<\/ul>\n<p>recapped with Rubycon brand 105\u00b0 type<\/p>\n<p><a href=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2025\/01\/A2060.zip\">original ROM<\/a><\/p>\n<\/div>\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\\\/2022\\\/05\\\/18\\\/a2060-arcnet\\\/\",\"likes_blog_id\":false}' id='gallery-1' class='gallery galleryid-9797 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\/2022\/05\/18\/a2060-arcnet\/20220518_132458\/#main'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132458-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" data-attachment-id=\"9800\" data-orig-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132458-scaled.jpg\" data-orig-size=\"2560,1440\" 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;1652880298&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;6&quot;,&quot;iso&quot;:&quot;200&quot;,&quot;shutter_speed&quot;:&quot;0.03030303030303&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;,&quot;keywords&quot;:&quot;Array&quot;}\" data-image-title=\"20220518_132458\" data-image-description=\"\" data-medium-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132458-300x169.jpg\" data-large-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132458-1024x576.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\/2022\/05\/18\/a2060-arcnet\/20220518_132533\/#main'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132533-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" data-attachment-id=\"9801\" data-orig-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132533-scaled.jpg\" data-orig-size=\"2560,1453\" 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;1652880333&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;6&quot;,&quot;iso&quot;:&quot;200&quot;,&quot;shutter_speed&quot;:&quot;0.04&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;,&quot;keywords&quot;:&quot;Array&quot;}\" data-image-title=\"20220518_132533\" data-image-description=\"\" data-medium-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132533-300x170.jpg\" data-large-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132533-1024x581.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\/2022\/05\/18\/a2060-arcnet\/20220518_132608\/#main'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132608-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" data-attachment-id=\"9802\" data-orig-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132608-scaled.jpg\" data-orig-size=\"2560,1440\" 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;1652880368&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.3&quot;,&quot;iso&quot;:&quot;125&quot;,&quot;shutter_speed&quot;:&quot;0.02&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;,&quot;keywords&quot;:&quot;Array&quot;}\" data-image-title=\"20220518_132608\" data-image-description=\"\" data-medium-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132608-300x169.jpg\" data-large-file=\"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/hegatad\/uploads\/2022\/05\/20220518_132608-1024x576.jpg\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>A2060 Serial: 02743 Company Commodore, USA Date 1990 Amiga A2000, A3000, A4000 Interface Zorro II Autoconfig ID 514 \/ 8,9 Arcnet interface developed from the\u00a0Ameristar Arcnet Controller Arcnet networking system &#8211; old, slow but cheap and reliable, useful for small LANs and simple network sharing Arcnet requires RG62 coaxial cable instead of the RG58 used [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9800,"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-9797","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\/9797","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=9797"}],"version-history":[{"count":0,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/posts\/9797\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/media\/9800"}],"wp:attachment":[{"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/media?parent=9797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/categories?post=9797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.intexsound.de\/Commodore-Museum-Mannheim\/wp-json\/wp\/v2\/tags?post=9797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}