NES games did use 128 Kilobyte (1 Megabit) 28-pin Program ROMs at times, but they are not common by any means. No NES game ever used a 256 Kilobyte (2 Megabyte) 28-pin ROM. I assume Nintendo used these odd ROMs during chip shortages or when they could get a good deal on them.
NES games did use 128 Kilobyte (1 Megabit) 28-pin Program ROMs at times, but they are not common by any means. No NES game ever used a 256 Kilobyte (2 Megabyte) 28-pin ROM. I assume Nintendo used these odd ROMs during chip shortages or when they could get a good deal on them.
Ahhh okie thanks....I was looking for a hard project, and was going to try to make a NWC repro cart, and the image's appeared to be 2 256k files
It is, but wouldn't using one 256KB EPROM work just as well? The NWC cart uses two standard 32-pin 128KB EPROMs. You could eliminate a decoder chip as well.
It is, but wouldn't using one 256KB EPROM work just as well? The NWC cart uses two standard 32-pin 128KB EPROMs. You could eliminate a decoder chip as well.
Ummm unless I looked at something wrong, it would require a board that use's only 28 pin eproms ?