So im dumping this cart with the kazoo MMC3 script. The first thing anyone trying this should know is to manually set the mapper to 118.
I did not and the original rom ran but the patched did not.
So the header with 118 mapper resulted in a header of:
4E 45 53 1A 10 10 62 70
So the area of interest is the last 2 bytes: 62 70 (0110 0010 0111 0000)
mapper = 0x76 (118) so this right
0010 = 1: Cartridge contains battery-backed PRG RAM ($6000-7FFF) or other persistent memory
another rom i came across as reference by the translation page has the same except those 2 bytes: 61 70
0001 = 1: vertical (horizontal arrangement) (CIRAM A10 = PPU A10)
odd then oddly enough the patch added the battery bit back in to make it 0x63
I have no idea if the 0x1 bit is really necessary. The game seems to emulate ok with either...
Anyone have an idea?