{"id":951,"date":"2020-07-08T17:32:54","date_gmt":"2020-07-08T15:32:54","guid":{"rendered":"https:\/\/retrofixes.it\/?p=951"},"modified":"2023-03-28T09:23:06","modified_gmt":"2023-03-28T07:23:06","slug":"c128-ripristino","status":"publish","type":"post","link":"https:\/\/retrofixer.it\/en\/c128-ripristino\/","title":{"rendered":"C128 Reset"},"content":{"rendered":"
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History of a Commodore 128<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Someone has to do this dirty work!\u2026<\/p>

I took this C128 with a serious dirty problem, well nothing serious, just a lot of elbow grease to make it return to its former glory.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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After a first cleaning, you can also notice the yellowing of the keys and here too you need a little Retrobright..
The keys can be easily removed using a small tool with a wire, then you move on to cleaning with soap\/degreaser and finally with hydrogen peroxide 30 volumes and lots of sun!!!
This also had a little rust on the iron base of the keyboard, so you need to remove it with sandpaper and leave the piece soaked in vinegar, once cleaned proceed with the painting.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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After the Retrobright, here is the nice clean fretboard of the 128.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The problems don't end there...<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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After this cleaning here is a second problem.. the RAM! the computer had problems starting up caused by one or more defective RAM.<\/p>

After some tests with the diagnostic cartridge I identified some rams and started removing them and testing them individually with Arduino and a project to test the rams..<\/p>

Having no banks to replace, I had to use a larger RAM (4464) and adapt it to 4 banks, so I was able to restart the computer while waiting for the new banks to replace.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Finally all settled...<\/p>

Even with the diagnostic cartridge for the C128 no problems found.<\/p>

PS. To create the test cartridge I used the Ultimate 1541 II, you can load the roms in an instant without having to have a cartridge with eprom to program every time.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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End!. Also this computer is safe and restored to its original splendour!!!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Storia di un Commodore 128 Questo sporco lavoro qualcuno lo deve pur fare!… Ho preso questo C128 con un vistosto problema di zozzo, beh nulla di [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":960,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,19],"tags":[173,61,58,397,67,65,398],"class_list":["post-951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-commodore","category-computer","tag-173","tag-c128","tag-commodore","tag-pulizia","tag-ram","tag-retrobright","tag-ripristino"],"_links":{"self":[{"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/posts\/951","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/comments?post=951"}],"version-history":[{"count":0,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/posts\/951\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/media\/960"}],"wp:attachment":[{"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/media?parent=951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/categories?post=951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/retrofixer.it\/en\/wp-json\/wp\/v2\/tags?post=951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}