INES Mapper 180: Difference between revisions

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[[Category:iNES Mappers|180]][[Category:Discrete logic mappers|180]][[Category:in NesCartDB|180]]
{{DEFAULTSORT:180}}[[Category:iNES Mappers]][[Category:Discrete logic mappers]]
{{nesdbbox
|ines|180|iNES 180
}}
[[INES Mapper 180]] is used to represent an unusual configuration of the [[UNROM]] board used only for the game ''Crazy Climber''.


[[INES Mapper 180]] is used to represent a reconfiguration of the [[UxROM|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 ([[7408|74HC08]]) instead of OR logic ([[7432|74HC32]]), producing a fixed first bank at $8000 rather than a fixed last bank at $C000.
== Notes ==
It is similar in principle to the more common [[INES Mapper 002]] configuration but uses AND logic ([[7408|74HC08]]) instead of OR logic ([[7432|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.
Crazy Climber had a special "climber stick" add-on that mounted a stick on top of the Famicom's directional pad.
Because [[APU DMC]] is usually restricted to $C000-$FFFF, this behavior might be useful for games with a lot of recorded speech.
But like [[BNROM]] and [[AxROM]], this configuration requires the 6502's vectors to sit in the last few bytes of each bank.
[[iNES Mapper 097|Mapper 97]] adds mapper-selectable 1sc/H/V mirroring (and changes the fixed bank).


== Overview ==
== Overview ==

Revision as of 18:29, 24 April 2015

NESCartDB
iNES 180

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

Notes

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.

Overview

  • PRG ROM size: 128 KB
  • PRG ROM bank size: 16 KB
  • PRG RAM: None
  • CHR capacity: 8 KB RAM
  • CHR bank size: Not bankswitched
  • Nametable mirroring: Solder pads select vertical or horizontal mirroring
  • Subject to bus conflicts: Yes

Banks

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

Registers

Bank select ($8000-$FFFF)

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

See also

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