Woot! Finally got my Q*bert board fixed....sorta....

elekTRONarcade

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Woot! Finally got my Q*bert board fixed....sorta....

So after a lot of trial and error without an oscilloscope, i finally was able to get my Q*bert board glitch-free using the tried and true IC swap method between my old board and the board Rob brought me a few weeks ago. So yay...my Q*bert finally works.....sorta.

I still haven't fixed the sound yet though. I received the new LM379S and the 27v zener from Riptor today and installed both. Now instead of no sound, I just get a constant hum. The zener's reading a steady 29v which is fine. I've heard U3 is the usual culprit in this case. Can anyone confirm this, or have an extra U3 / 6502A they could sell me?
 
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Okay, looks like I was slightly wrong. The graphics are ALMOST working perfectly. One side of the squares (depends on the level) is black instead of colored; Half of the world Level is missing color on the shadowed area (0:16) and on the High Scores screen, the top half of the screen characters are messed up, and the middle F of FFF is a block (1:12).

Here's a link to the video. Rip, if you read this, your input would be very greatly appreciated.

 
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