Re: video problem on Space Duel

From: Rodger Boots <rlboots_at_cedar-rapids.net>
Date: Tue Sep 10 2002 - 01:46:15 EDT

Joe Bachmann wrote:

>Update of this:
>
>I found that the 555 on the board next to the processor is getting extremely hot.
>Replaced it and the new one has the same issue. I can hear some white noise from the
>speaker if on turn it up. Again, same results both cabinets. Other boards work fine.
>
>Perhaps a bad 6502a? doubtful to me..
>
>

Easy enough to tell, run the game WITHOUT the 6502A and see if the 555
gets hot. It would take one hell of a current draw to heat a 555, they
can output a quarter of an amp!

Now, the CMOS version of the 555 is a different story, only good for a
tenth of an amp.

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Received on Mon Sep 9 23:07:52 2002

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