Rom ID Needed

Gamer4Life

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I have a punch out board with the roms you in the picture. They are the character roms 6n 6p 8n 8p they are supposed to be 2564s. Anyone know what they are?
 

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He's saying they are one-time-programmable ROMs rather than EPROMs (so they are not 2564).

Ok here is my issue. I have a PO board that is missing those prom/eproms . the manual calls out 2564s for those locations. I made a set of 2564s, but they dont work, the proms from my other board work fine in it.

Thanks,
Keith
 
Ok here is my issue. I have a PO board that is missing those prom/eproms . the manual calls out 2564s for those locations. I made a set of 2564s, but they dont work, the proms from my other board work fine in it.

Thanks,
Keith

The 2564 is an oddball chip.... My guess is that they were not correctly programmed.
 
The 2564 is not the same as a 2764... Check your programmer settings.
 
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