INES Mapper 002: Difference between revisions

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[[Category:iNES Mappers|002]][[Category:in NesCartDB|002]]
[[Category:iNES Mappers|002]][[Category:in NesCartDB|002]]


[[iNES Mapper 002]] is used to designate the most common configuration of the [[UxROM]] boardset, generalized to support up to 2048 KB of PRG ROM (iNES) or 4096 KB of PRG ROM ([[NES 2.0]]). Here are Disch's original notes:
[[iNES Mapper 002]] is used to designate the most common configuration of the [[UxROM]] boardset, generalized to support up to 2048 KB of PRG ROM (iNES) or 4096 KB of PRG ROM ([[NES 2.0]]).
 
  ========================
  =  Mapper 002          =
  ========================
 
  aka
  --------------------------
  UxROM (and compatible)
 
 
  Example Games:
  --------------------------
  Mega Man
  Castlevania
  Contra
  Duck Tales
  Metal Gear
 
 
  Notes:
  ---------------------------
  UxROM has bus conflicts, however mapper 002 is meant to be UxROM and compatible.  So some mappers which were
  similar in function, but did not have bus conflicts are included.
 
  Additionally, UxROM does not have an 8 bit reg.  UNROM is capped at 128k PRG, and UOROM is capped at 256k.
 
  So to be "safe":
  - for homebrewing:  assume bus conflicts, do not exceed 256k
  - for emudev:  assume no bus conflicts, use all 8 PRG reg bits
 
  There is no CHR swapping.  Every mapper 002 game I've ever seen has CHR-RAM.
 
 
  Registers (**BUS CONFLICTS** sometimes):
  --------------------------
    $8000-FFFF:  [PPPP PPPP]
      PRG Reg
 
 
  PRG Setup:
  --------------------------
 
        $8000  $A000  $C000  $E000 
      +---------------+---------------+
      |    $8000    |    { -1}    |
      +---------------+---------------+


== See also ==
== See also ==
* [[UxROM]]
* [[UxROM]]
* [[Programming UNROM]]
* [[Programming UNROM]]

Revision as of 11:56, 20 April 2015


iNES Mapper 002 is used to designate the most common configuration of the UxROM boardset, generalized to support up to 2048 KB of PRG ROM (iNES) or 4096 KB of PRG ROM (NES 2.0).

See also

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