NES 2.0 Mapper 337: Difference between revisions
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NewRisingSun (talk | contribs) (Created page with "Category:Multicart mappersCategory:Mappers with CHR RAM NES 2.0 mapper 337 is used for a ''12-in-1 Game Card'' multicart. Its UNIF board name is '''BMC-CTC-12IN1'''....") |
(defaultsort. Also corrected what looked like a typo in register description) |
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[[Category:Multicart mappers]][[Category:Mappers with CHR RAM]] | {{DEFAULTSORT:337}}[[Category:Multicart mappers]][[Category:Mappers with CHR RAM]] | ||
NES 2.0 mapper 337 is used for a ''12-in-1 Game Card'' multicart. Its UNIF board name is '''BMC-CTC-12IN1'''. | NES 2.0 mapper 337 is used for a ''12-in-1 Game Card'' multicart. Its UNIF board name is '''BMC-CTC-12IN1'''. | ||
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|| 1: Horizontal | || 1: Horizontal | ||
++-------- Select PRG-ROM banking mode | ++-------- Select PRG-ROM banking mode | ||
0: NROM-128 (inner bank bit 0 replaced with CPU A14) | 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) | 2: UNROM (inner bank fixed to #7 at CPU $C000-$FFFF) | ||
3: same as 2 | 3: same as 2 | ||
Revision as of 06:54, 26 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 outer 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.
