Today I\u2019m revisiting my #Atari<\/a> 1040 STf that I got last year from @benjedwards<\/a>. I’d like to fix the floppy drive (doesn’t seem to read or format disks), upgrade TOS, and fix the two broken keys on the keyboard.<\/p>\n\n\n\n With some very kind help of @Recta_Pete<\/a>, I got the parts to replace the broken keys. He also lent me an external hard drive (!) and Atari SC1224 monitor (!!)<\/p>\n\n\n\n RF shield and power supply removed reveals the motherboard. Looks like I have the 6 chip TOS board. Also, great to see the giant DIP64 68000 here.<\/p>\n\n\n\n So, do I round up six 27C256 32KB EPROMs, figure out how to split them Hi\/Lo, and burn them myself or just buy them ready made?<\/p>\n\n\n\n .. some time passes ..<\/p>\n\n\n\n Somehow, I pulled together an assortment of 256Kb UV EPROMs, erased the non-blank ones, and programmed a set. They\u2019re a mixture of speeds which likely isn\u2019t good. But let\u2019s see if this works.<\/p>\n\n\n\n Installed the 6 new EPROMs and wow, it seems to work! As I understand it, it\u2019s Rainbow TOS because the Atari logo cycles through colors in 1.04.<\/p>\n\n\n\n July 4, 2022<\/strong><\/p>\n\n\n\n Time to repair these two broken keys on the Atari 1040ST. Thanks to @Recta_Pete<\/a> for the parts!<\/p>\n\n\n\n There\u2019s so many screws on the back of the keyboard I lost count. Keyboard is dated March 26, 1986.<\/p>\n\n\n\n Circuit board separated from the top reveals a ton of rubber domes that thankfully stayed in place, except a few. They provide the spring action and a conductive underside for contact closure.<\/p>\n\n\n\n The old broken posts simply slide out and new ones inserted. New key cap snaps onto the posts. Reassembled and it works great!<\/p>\n\n\n\n (Originally a Twitter thread started June 12, 2022) June 12, 2022 Today I\u2019m revisiting my #Atari 1040 STf that I got last year from @benjedwards. I’d like to fix the floppy drive (doesn’t seem to read or format disks), upgrade TOS, and fix the two broken keys on the keyboard.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,15],"tags":[94],"_links":{"self":[{"href":"https:\/\/biosrhythm.com\/index.php?rest_route=\/wp\/v2\/posts\/2461"}],"collection":[{"href":"https:\/\/biosrhythm.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/biosrhythm.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/biosrhythm.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/biosrhythm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2461"}],"version-history":[{"count":1,"href":"https:\/\/biosrhythm.com\/index.php?rest_route=\/wp\/v2\/posts\/2461\/revisions"}],"predecessor-version":[{"id":2481,"href":"https:\/\/biosrhythm.com\/index.php?rest_route=\/wp\/v2\/posts\/2461\/revisions\/2481"}],"wp:attachment":[{"href":"https:\/\/biosrhythm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/biosrhythm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2461"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/biosrhythm.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/biosrhythm.com\/wp-content\/uploads\/2023\/01\/1536002390066962432-FVD6BnJXsAEvEdV-840x630.jpg\")
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