nesdev.org

yea, your right, i was looking at the eprom pinout. so i think i was wiring the PRG correctly if the MMC2 has the normal pinout. but it is still not working. it doesnt seem logical that this board would have different pinouts, but i guess anything is possible. no clue what to do to get this working

it looks like from the pictures you wired it like this: bent up pins 1,2,24,31,32 wired pin 1 to pin 16 wired pin 24 to pin 22 wired pin 2 to hole 24 wired pin 31 and pin 32 to pin 30 can you confirm if this is correct? OK, I just got the cart. Yup, this is all correct. The only thing missing is pi...

ok, that makes sense. i was looking at your UOROM repro: http://nesdev.com/bbs/viewtopic.php?t=2849&highlight=uorom it looks like from the pictures you wired it like this: bent up pins 1,2,24,31,32 wired pin 1 to pin 16 wired pin 24 to pin 22 wired pin 2 to hole 24 wired pin 31 and pin 32 to pin...

if the hack is just a graphics change, could you just switch out the CHR chip?

Jeroen wrote:Probably lots of multimetering and hours behind the osciloscope.

yikes

all i can think of is that the rom pinout is different than this:

http://nesdev.com/NES%20ROM%20Pinouts.txt

if so, how could you tell? meaning, how were these figured out in the first place?

so i got around to trying to make this, i think the PRG is wired wrong though. I bent up pins 1,2,24,31,32. I wired hole 24 to pin 2, pin 24 to pin 16 and then pin 1 to pin 30,31,32. this is how i normally wire up an UNROM. anybody know what could be wrong?

ahh, that makes sense, i always wondered why that was.

accoring to the eprom conversions, they are very close except for one wire: MMC1: CHR socket: Bend up pins 1, 2, 22, 24, 30 and 31 (or cut tracks) Solder pin 2 to hole 24 (A16) Solder pin 22 to hole 31 (CE or CHR /A13) Solder pin 24 to hole 2 (OE or CHR /RD) MMC3 CHR socket: Bend up pins 1, 2, 22, 2...

ok, ill give it a shot, i have a punchout cart coming next week. ive made UNROM's before, so ill try to wire it like that. should i wire the CHR like an MMC3 or MMC1?

any idea how to wire it?

it looks like there are only 28 pins in the board for the prg:

http://bootgod.dyndns.org:7777/image.php?ImageID=8169

would it be possible to wire up a 32 pin eprom here?

no, i am trying to makee a repro of a punchout hack

anybody know the pinout for the PRG and CHR for a MMC2? i wanted to make a repro and couldnt find anything about this board

if you put a pal rom on an american board, will this work in american systems? i have already done this, but my nes has the lockout chip cut, so i dont know if it works with unmodified systems.