PxROM: Difference between revisions

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[[Category:Nintendo licensed mappers]]
The designation '''PxROM''' covers all boards that use the [[MMC2|Nintendo MMC2]] mapper. The [[iNES]] format assigns [[iNES Mapper 009|mapper 9]] to these boards.
The designation '''PxROM''' covers all boards that use the [[MMC2|Nintendo MMC2]] mapper. The [[iNES]] format assigns [[iNES Mapper 009|mapper 9]] to these boards.



Revision as of 21:24, 21 April 2015

The designation PxROM covers all boards that use the Nintendo MMC2 mapper. The iNES format assigns mapper 9 to these boards.

Board Types

The following PxROM boards are known to exist:

Board PRG ROM CHR
PNROM 128 KB 128 KB ROM
PEEOROM 128 KB 128 KB ROM

Overview

  • PRG ROM size: up to 128 KB
  • PRG ROM bank size: 16 KB
  • PRG RAM: 8 KB plus optional battery
  • CHR capacity: up to 128 KB ROM
  • CHR bank size: 4 KB
  • Nametable mirroring: Controlled by mapper
  • Subject to bus conflicts: No

Notes

The PEEOROM board is used in the re-issue of Mike Tyson's Punch-Out!!. Unlike PNROM, and unlike most other boards used in NES Game Paks sold to the public, it can be configured to support EPROM memory through jumpers on the board.