Well I believe this to be minor...
Anyway, there are what appears to be vertical bars affecting only some background graphics.
In the screens attached you can see it affects the Warning text screen, Ram check and title screen (not shown). In the other screen shot you can see that during game play the bars knock out parts of the stage graphics as it scrolls however no sprites are effected when they pass over it.
Some basic things I have tried:
Planning to do more on this soon, dump and check EPROM's etc.. but I am mainly posting this to see if anyone else has come across the issue before and can narrow down my area of investigation..
Thanks.
Anyway, there are what appears to be vertical bars affecting only some background graphics.
In the screens attached you can see it affects the Warning text screen, Ram check and title screen (not shown). In the other screen shot you can see that during game play the bars knock out parts of the stage graphics as it scrolls however no sprites are effected when they pass over it.
Some basic things I have tried:
- Re-seated daughter board
- re-seated all EPROM's
- piggy backed a number of the worker RAM's
- one at a time removed some of the EPROM's while running to see if they effected the issue. No luck..
Planning to do more on this soon, dump and check EPROM's etc.. but I am mainly posting this to see if anyone else has come across the issue before and can narrow down my area of investigation..
Thanks.