On 02/02/2017 08:26 PM, Gerrit Heitsch wrote: > On 02/02/2017 07:32 PM, Francesco Messineo wrote: >> And it's dead again :( >> I was typing the cbmlink bootstrap basic program. >> I saved it on tape and I was trying the first test runs as it just >> died on me. >> Now at reset it clears the video memory and sometimes it displays a >> few random characters but most of the time the screen remains just >> blank. >> I'm going to try to substitute the kernel ROM since on one of my >> programmers refuses to read entirely (on another one reads fine every >> time). >> With no kernel ROM, the screen remains full of characters as it should. >> Ok... old hardware isn't so easy to fix after all. > > Could be a bad RAM. As far as I know, the 3032 uses 2 banks of 4116 > DRAMs. You can swap both banks by desoldering and then crossing 2 > resistors. If it's RAM, that should make the system behave differently. > Which ones? For that I would need the schematics... Anyone have them? If the schematics at http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/2001N/320349-6.gif fit your board, it would be R41 and R42 which you'd have to cross to swap the banks. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2017-02-02 20:01:42
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