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Posted Thu Aug 12, 2010 11:45 AM
Posted Thu Aug 12, 2010 6:33 PM
More likely a bad RAM chip than a bad VDP.
Yeah, you're right - I discovered that a week or so ago, just didn't update the thread.
Someone on the vintage computer forum suggested a bad power supply might've caused the ram chips to go bad, but my multimeter is showing the voltages to be pretty steady. I'm thinking about ordering a full set of eight 4116 RAM chips from Jameco to give this another shot.
Still though, I wonder why re-seating the VDP helped at first? It doesn't do anything now, but at first it caused the graphics to clear up temporarily.
Edited by Keatah, Thu Aug 12, 2010 6:38 PM.
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