The legs of the chip in question aren't rusty by any chance are they?
I've had that cause signal / voltage drop before and just going through and
replacing the worst of the rusty chips on the board in question resolved it's
issues.
Just a thought :)
Martin.
On Saturday 02 April 2005 16:00, Robert C. Bullock wrote:
> I have a Pac with a low 6M* line, when I piggyback a 74LS86 (IIRC, whatever
> chip generates that signal) on it, it's fine, but taking it off, the game
> 'bogs down', sometimes, but plays with no glitches but somtimes the music
> slows down speeds up, etc. Looks like low TTL levels measured at Pin 1 on
> the z80 sync buss card. When I say piggyback, I put my logic comparator on
> it and it raises the levels by about .4V
>
> Do folks just slap some HC chips in the circuit or is there a better
> classic
>
> way to fix this? Course I could just solder a duplicate chip on top I
> guess.
>
> I suppose something else tied to that line may be pulling it down but I
> haven't gotten that far yet. Replacing the crappy sync buss single wipe
> socket may help of course.
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Received on Sat Apr 02 09:05:09 2005
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