NES 2.0 Mapper 432: Difference between revisions
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'''NES 2.0 Mapper | {{DEFAULTSORT:432}}[[Category:Multicart mappers]][[Category:MMC3-like mappers]][[Category:Mappers with scanline IRQs]] | ||
'''NES 2.0 Mapper 430''' denotes the MMC3-based Realtec '''8090''' multicart circuit board, used for the ''3-in-1 High Standerd [sic] (DP-33)'' multicart. | |||
==Outer Bank Register ($6000-$7FFF, write)== | |||
Mask: $E000 | |||
D~7654 3210 | |||
--------- | |||
...B .M.b | |||
| | +-- PRG/CHR A17 | |||
| +---- 0: PRG/CHR A17=MMC3 PRG/CHR A17 (256 KiB inner PRG/CHR bank) | |||
| 1: PRG/CHR A17=b (128 KiB inner PRG/CHR bank) | |||
+------- PRG/CHR A18 | |||
As it uses the MMC3 clones's WRAM interface, writing to the outer bank register requires enabling and not write-protecting WRAM in the MMC's $A001 register. | |||
==MMC3-compatible registers ($8000-$FFFF)== | |||
Mask: $E001 | |||
See [[MMC3]]. | |||
Revision as of 14:52, 18 December 2021
NES 2.0 Mapper 430 denotes the MMC3-based Realtec 8090 multicart circuit board, used for the 3-in-1 High Standerd [sic] (DP-33) multicart.
Outer Bank Register ($6000-$7FFF, write)
Mask: $E000
D~7654 3210
---------
...B .M.b
| | +-- PRG/CHR A17
| +---- 0: PRG/CHR A17=MMC3 PRG/CHR A17 (256 KiB inner PRG/CHR bank)
| 1: PRG/CHR A17=b (128 KiB inner PRG/CHR bank)
+------- PRG/CHR A18
As it uses the MMC3 clones's WRAM interface, writing to the outer bank register requires enabling and not write-protecting WRAM in the MMC's $A001 register.
MMC3-compatible registers ($8000-$FFFF)
Mask: $E001
See MMC3.
