NES 2.0 Mapper 432: Difference between revisions

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(Created page with "'''NES 2.0 Mapper 432''' denotes the '''Realtec 8090''' PCB, used for the MMC3-based ''3-in-1 High Standerd [sic] (DP-33)'' multicart.")
 
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'''NES 2.0 Mapper 432''' denotes the '''Realtec 8090''' PCB, used for the [[MMC3]]-based ''3-in-1 High Standerd [sic] (DP-33)'' multicart.
{{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.