NES 2.0 Mapper 302: Difference between revisions
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Latest revision as of 20:14, 24 April 2018
NES 2.0 Mapper 302 is used for Kaiser's ROM cartridge conversion of the Japanese Famicom Disk System version of Gyruss. Its UNIF board name is UNL-KS7057.
Banks
- CPU $6000-$67FF: 2 KiB switchable PRG-ROM bank
- CPU $6800-$6FFF: 2 KiB switchable PRG-ROM bank
- CPU $7000-$77FF: 2 KiB switchable PRG-ROM bank
- CPU $7800-$7FFF: 2 KiB switchable PRG-ROM bank
- CPU $8000-$87FF: 2 KiB switchable PRG-ROM bank
- CPU $8800-$8FFF: 2 KiB switchable PRG-ROM bank
- CPU $9000-$97FF: 2 KiB switchable PRG-ROM bank
- CPU $9800-$9FFF: 2 KiB switchable PRG-ROM bank
- CPU $A000-$BFFF: 8 KiB fixed PRG-ROM bank #$0D
- CPU $C000-$FFFF: 16 KiB fixed PRG-ROM bank #$07
- PPU $0000-$1FFF: 8 KiB unbanked CHR-RAM
Registers
Mirroring select ($8000-$9FFF)
Mask: unknown, probably $E000 D~7654 3210 --------- .... ...M +- Select nametable mirroring type 0: Vertical 1: Horizontal
PRG-ROM Bank ($B000-$E003)
Mask: unknown, probably $F003 A~FEDC BA98 7654 3210 ------------------- 1RRR .... .... ..RN ||| |+- 0: Select low nibble ||| | 1: Select high nibble +++-------------+-- Select register number $B000/$B001: Set 2 KiB PRG-ROM bank at CPU $8000-$87FF $B002/$B003: Set 2 KiB PRG-ROM bank at CPU $8800-$8FFF $C000/$C001: Set 2 KiB PRG-ROM bank at CPU $9000-$97FF $C002/$C003: Set 2 KiB PRG-ROM bank at CPU $9800-$9FFF $D000/$D001: Set 2 KiB PRG-ROM bank at CPU $6000-$67FF $D002/$D003: Set 2 KiB PRG-ROM bank at CPU $6800-$6FFF $E000/$E001: Set 2 KiB PRG-ROM bank at CPU $7000-$77FF $E002/$E003: Set 2 KiB PRG-ROM bank at CPU $7800-$7FFF