Hello new friends,
I'm modifying Mega Man 2 and I have a few things I need help on. It's mainly the hardware that's giving me the uncertainty. I see that Mega Man 2 is an SGROM-02 cart, and I was planning to use Rad Racer as a donor. Rad Racer is also an SGROM-02 cart, however has only a 28-pin PRG-ROM, as opposed to Mega Man 2's 32-pin PRG-ROM. The board has holes for 32 pins, so I can use a 32-pin DIP; but do I need to? I have a pair of Atmel AT28C256 flash chips- is there a way to make these work? Or must I find a 32-pin? If I can't use mine, and I wanted to avoid UV EPROMs and stick with flash chips, would you recommend a part number?
I've read that the SGROM wiring should be identical to the SNROM on multiple sites, so I'm going to go with this being truth unless told otherwise. That means I'll be following the SNROM mod steps (bend pins 1,2,24,30,31... etc) correct?
I guess the first question I need to get out of the way would be what anyone recommends for a 32 pin flash chip if I cannot use my existing AT28C256s...
Sources:
NesCartDB - Mega Man 2
NesCartDB - Rad Racer
Atmel AT28C256, page 2
X-posted in /r/NesDev
Thanks SpaceCowboy58
I'm modifying Mega Man 2 and I have a few things I need help on. It's mainly the hardware that's giving me the uncertainty. I see that Mega Man 2 is an SGROM-02 cart, and I was planning to use Rad Racer as a donor. Rad Racer is also an SGROM-02 cart, however has only a 28-pin PRG-ROM, as opposed to Mega Man 2's 32-pin PRG-ROM. The board has holes for 32 pins, so I can use a 32-pin DIP; but do I need to? I have a pair of Atmel AT28C256 flash chips- is there a way to make these work? Or must I find a 32-pin? If I can't use mine, and I wanted to avoid UV EPROMs and stick with flash chips, would you recommend a part number?
I've read that the SGROM wiring should be identical to the SNROM on multiple sites, so I'm going to go with this being truth unless told otherwise. That means I'll be following the SNROM mod steps (bend pins 1,2,24,30,31... etc) correct?
I guess the first question I need to get out of the way would be what anyone recommends for a 32 pin flash chip if I cannot use my existing AT28C256s...
Sources:
NesCartDB - Mega Man 2
NesCartDB - Rad Racer
Atmel AT28C256, page 2
X-posted in /r/NesDev
Thanks SpaceCowboy58