C64 sound problems
dbetz at xlisper.com
Thu Jul 23 07:00:19 CDT 2009
On Jul 10, 2009, at 2:43 PM, David Betz wrote:
>> are you using the correct cable plugged into the correct place?
>> this is usually the biggest cause.
>> sound was mono, and you need the proper wiring, and your tv/etc may
>> only accept
>> mono sound on a specific input
> One thing I've been wondering about is if this could be caused by
> problems with the 12v supply feeding the SID. Is there anything else
> in the C64 that uses that voltage or is it just for the SID?
I finally got around to checking the 12v supply in my C64 and it seems
to be working. I also verified that 12v is getting to the VDD pin on
the SID chip so lack of 12v is not my problem. One thing I noticed
that I thought rather strange was that the VCC pin on the SID reads
5.27v but the output of the 5v regulator is correct. Is there a reason
why the VCC at the SID would be higher? Could this be causing a problem?
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