INES Mapper 180

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UxROM (inverted)
Company Nichibutsu
Games 1 in NesCartDB
Complexity Discrete logic
Boards UNROM
PRG ROM capacity 128K/4096K
PRG ROM window 16K fixed + 16K
PRG RAM capacity None
CHR capacity 8K
CHR window n/a
Nametable mirroring Fixed H or V, controlled by solder pads
Bus conflicts Yes
Audio No
iNES mappers 180, 002, 094
iNES 180

INES Mapper 180 is used to represent an unusual configuration of the UNROM board used only for the game Crazy Climber.


It is similar in principle to the more common INES Mapper 002 configuration but uses AND logic (74HC08) instead of OR logic (74HC32), producing a fixed first bank at $8000 rather than a fixed last bank at $C000.

Crazy Climber had a special "climber stick" add-on that mounted a stick on top of the Famicom's directional pad.

For a similar mapper with additional mirroring control, see iNES Mapper 097.


  • CPU $8000-$BFFF: 16 KB PRG ROM bank, fixed to the first bank
  • CPU $C000-$FFFF: 16 KB switchable PRG ROM bank


Bank select ($8000-$FFFF)

7  bit  0
---- ----
xxxx xPPP
      +++-- Select 16 KB PRG ROM bank for CPU $C000-$FFFF

See also