Hi, It has black screen of course. I know that the Kernal ROM or VIC used to be the guilty ones. I have burnt a 27c128 with Kernal but still have to build an adapter so I cannot 100% rule out Kernal issue. The guy who sold it said that the 6502 is also sick (he has tried the CPU in an 1541), though with oscilloscope I have seen e.g. proper phi2 signal coming out. I have bought some Rockwell 6502s to replace it. Anyway even if it turns out that VIC is good it is better to have a spare IC. I should hook up my logic analyzer to it but so far I had no time (or I was just too lazy). Thanks Hege -----Original Message----- From: Francesco Messineo Sent: Tuesday, October 25, 2016 10:23 PM To: email@example.com Subject: Re: 6561-101 Hi On Tue, Oct 25, 2016 at 10:07 PM, Hegedűs István <firstname.lastname@example.org> wrote: > Hi, > > I have a broken VIC20 which seems to have a bad VIC. Does anyone know > where > can I buy one for a fair price? what's the symptom? The 6561 was reliable enough. I can't remember changing any in the '80s (but VIC-20s were already almost estinct when I started repairing commodore stuff, so don't flame please). As far as I remember, the 6561 was only used for the VIC-20. Some IC traders might have them in stock, but I'd say it's a question of luck to get good chips instead of bad/fakes nowadays. I can help in troubleshooting your VIC-20 (as surely many others here) if you're unsure. Best regards Frank Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2016-10-25 21:00:50
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