Porchy
Member
Hello all
Im brand new to this forum but have a little past experience with arcade pcbs.
Ive finally got round to fixing my X-Multiply pcb, the sprites have white boxes around and a few other things messed up too. Im pretty sure the mask T44.00 is on its way out, the pins are REALLY corroded. The mask is an NEC23C1000AC.
I have verrified the checksum of all the other chips and they check out fine unfortunately I cannot check this one.
Anyway, my question is what eprom will I be able to get away with for a replacement at the current rom is a 28pin and most other eproms i have seem of this size (128k x 8) are 32 pin.
Could I get away with using a 32pin 27C1001 and tieing the VCC pin (#32) to the NC pin (28).
Any help would be gratefully appreciated.
Im brand new to this forum but have a little past experience with arcade pcbs.
Ive finally got round to fixing my X-Multiply pcb, the sprites have white boxes around and a few other things messed up too. Im pretty sure the mask T44.00 is on its way out, the pins are REALLY corroded. The mask is an NEC23C1000AC.
I have verrified the checksum of all the other chips and they check out fine unfortunately I cannot check this one.
Anyway, my question is what eprom will I be able to get away with for a replacement at the current rom is a 28pin and most other eproms i have seem of this size (128k x 8) are 32 pin.
Could I get away with using a 32pin 27C1001 and tieing the VCC pin (#32) to the NC pin (28).
Any help would be gratefully appreciated.
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