NES 2.0 Mapper 372 is used for a revision of the Rockman I-VI multicart (PCB ID SFC-12). It is INES Mapper 045 but with one bit of outer bank register #2 working as a CHR-ROM/RAM switch.
Mask: $F001 D~7654 3210 --------- PPRC cccc |||| ++++- Select number of CHR bits from MMC3 |||| ($F: 256 KiB, $E: 128 KiB ... $7-$0: 1 KiB) |||+------ Select CHR A18 ||+------- Select CHR-ROM (0)/CHR-RAM (1, unbanked) ++-------- Select CHR A20-A21 and PRG A21-22
Note that the CHR-RAM bit works in the opposite direction from NES 2.0 Mapper 356.
Categories: Mappers with scanline IRQs, MMC3 with CHR ROM and CHR RAM, MMC3-like mappers, Multicart mappers