No I've not hard of anything else, but there is many versions of Punch Out.
There is also 3 japanese MMC4 games which has only one simple difference with the MMC2 when it comes to PRG bankswithing and added battery backup support.
kyuusaku wrote:MMC4 is different in that BOTH 4K CHR banks are switched via tile access.
Well I suppose that's also the case of the MMC2. I could be wrong, but the only difference is that MMC2 has 8k swappable / 24k fixed PRG bankswitching, while the MMC4 has the more standard 16k swappable / 16k fixed. Also MMC4 has SRAM+Battery support, MMC2 doesn't.
It should be very possible to hack punchout to run on a Fire Emblem Cart if you expand the PRG a bit. You'll have to copy the content of fixed bank $a000-$bfff between each 8kb PRG bank and that should work (expanding PRG from 128k to 256k).
If you made your own MMC2 game or demo but only have a MMC4 board to test, yes you could use this trick as well (other people could probably test it on a real MMC2 if you ask)
kyuusaku wrote:MMC4 is different in that BOTH 4K CHR banks are switched via tile access.
How would one go about converting a MMC2 to a MMC4? Is it totally different or a simple rewiring job?
I've asked this myself and the answer I got was no, and you'd be better off cloning the MMC4. It has to do with how in hardware they determine which ROM area is being accessed, it's internal to the mapper so you can't just rewire it. So there's no way to change it from 8K Swap + 24K Fixed.
Bregalad wrote:Also MMC4 has SRAM+Battery support, MMC2 doesn't.
That's not strictly correct; while the boards used in (Mike Tyson's) Punch-Out!! carts don't support save RAM or battery, the PlayChoice-10 version of the game does.
