NES 2.0 Mapper 372: Difference between revisions
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|||+------ Select CHR A18 | |||+------ Select CHR A18 | ||
||+------- Select CHR-ROM (0)/CHR-RAM (1, unbanked) | ||+------- Select CHR-ROM (0)/CHR-RAM (1, unbanked) | ||
++-------- Select CHR A20-A21 and PRG | ++-------- 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]]. | Note that the CHR-RAM bit works in the opposite direction from [[NES 2.0 Mapper 356]]. | ||
Latest revision as of 16:31, 6 July 2019
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.
CHR-AND, CHR-OR/PRG-OR MSB, CHR source ($6000 #2, write)
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.
