[Solved] TRON Graphics Issue
I have a tron boardset I am working on, and trying to determine what could be the problem before i start ripping every ic off, and replacing..
What i have checked:
1) All roms pass verify with tron set from mame.
2) All rams chips test ok (i swapped them all around with no issues, and even did test dip switches)
3) any logic chip that was socketed that could be swapped with same chip, swapped. (ie, 74ls244 for a 74ls244)
I am thinking possibility of one of the 3 74ls157 on the graphics board.
The MCP Cone is jacked up, and the tanks got grid bugs on them. its almost like its picking the wrong sprites?
Video: http://www.youtube.com/watch?v=lzpWu1G_Oaw
I have a tron boardset I am working on, and trying to determine what could be the problem before i start ripping every ic off, and replacing..
What i have checked:
1) All roms pass verify with tron set from mame.
2) All rams chips test ok (i swapped them all around with no issues, and even did test dip switches)
3) any logic chip that was socketed that could be swapped with same chip, swapped. (ie, 74ls244 for a 74ls244)
I am thinking possibility of one of the 3 74ls157 on the graphics board.
The MCP Cone is jacked up, and the tanks got grid bugs on them. its almost like its picking the wrong sprites?
Video: http://www.youtube.com/watch?v=lzpWu1G_Oaw
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