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Author Topic: C64: no picture  (Read 3156 times)

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Offline motorollin

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Re: C64: no picture
« on: January 12, 2007, 11:31:37 AM »
Hmm, have you got another C64 you can swap any chips? I think sometimes a dodgy SID can cause video problems.

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moto
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Code: [Select]
10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
50  NEXT C
60  NA-NA-NAAAA
70  NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA
80  GOTO 10
 

Offline motorollin

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Re: C64: no picture
« Reply #1 on: January 12, 2007, 01:12:32 PM »
@Ilwrath
Correct me if I'm wrong, but I think SID is used for timing in the video output. A dodgy SID can cause corrupt displays, and if it dies completely then the video won't work. Of course, there are lots of other things it could be :-(

@leofoe
If it doesn't respond to any commands, then it looks like it's dead :-(

--
moto
Logged
Code: [Select]
10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
50  NEXT C
60  NA-NA-NAAAA
70  NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA
80  GOTO 10
 
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