NES 2.0 Mapper 337: Difference between revisions
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(defaultsort. Also corrected what looked like a typo in register description) |
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.... .BBB 11W. .... .... .... | .... .BBB 11W. .... .... .... | ||
||| +----------------- 1=Write-protect CHR-RAM | ||| +----------------- 1=Write-protect CHR-RAM | ||
+++- Select 16 KiB | +++- Select 16 KiB inner PRG-ROM bank at CPU $8000-$BFFF/$C000-$FFFF | ||
=Similar Mappers= | =Similar Mappers= | ||
[[NES 2.0 Mapper 350]] is a variant for larger ROM sizes of this mapper. | [[NES 2.0 Mapper 350]] is a variant for larger ROM sizes of this mapper. | ||
Latest revision as of 21:14, 27 May 2020
NES 2.0 mapper 337 is used for a 12-in-1 Game Card multicart. Its UNIF board name is BMC-CTC-12IN1.
Banks
- CPU $6000-$7FFF: 8 KiB fixed PRG-ROM bank #1
- CPU $8000-$BFFF: 16 KiB switchable PRG-ROM bank
- CPU $C000-$FFFF: 16 KiB switchable PRG-ROM bank
- PPU $0000-$1FFF: 8 KiB of unbanked CHR-RAM
Registers
Outer Bank Register ($8000-$BFFF)
Mask: $C000
D~7654 3210
---------
PPMB B...
|||+-+---- Select 128 KiB outer PRG-ROM bank
||+------- Select nametable mirroring type
|| 0: Vertical
|| 1: Horizontal
++-------- Select PRG-ROM banking mode
0: NROM-128
1: NROM-256 (inner bank bit 0 replaced with CPU A14)
2: UNROM (inner bank fixed to #7 at CPU $C000-$FFFF)
3: same as 2
CHR-RAM is write-protected in the NROM modes.
Inner Bank Register ($C000-$FFFF)
Mask: $C000
D~7654 3210 A~FEDC BA98 7654 3210
--------- -------------------
.... .BBB 11W. .... .... ....
||| +----------------- 1=Write-protect CHR-RAM
+++- Select 16 KiB inner PRG-ROM bank at CPU $8000-$BFFF/$C000-$FFFF
Similar Mappers
NES 2.0 Mapper 350 is a variant for larger ROM sizes of this mapper.
