Asteroids vector issue..

rcoonjr

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This one has me baffled. I brought this boarrd back from the dead. No ram errors now bad sockets changed. But the video is torn. I have replaced the DACs with new ones. Anyone else see this issue before?

Also the monitor was rebuilt and does work well with a know working board.
 

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Changed a bunch of 74ls191s with no change to the picture. Hmmm. I'm about ready to throw in the towel on the board seems more screwed up than I was expecting. I have tried piggybacking a few 244's 245's with no change. I can try a new set of DACs .. since I have about 10 of them.
 
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