NES 2.0 Mapper 288: Difference between revisions

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(Created page with "288NES 2.0 Mapper 288 is used for two GKCX1 21-in-1 multicarts. Oddly, GoodNES 3.23b has them set to INES Mapper 133 even though it is entir...")
 
(Mirroring is not hard-wired after all.)
 
Line 2: Line 2:


=Address latch=
=Address latch=
  A~1... .... ...P PCCC
  A~1... .... ..MP PCCC
                | |+++- Select 8 KiB CHR-ROM bank at PPU $0000-$1FFF
              || |+++- Select 8 KiB CHR-ROM bank at PPU $0000-$1FFF
                +-+---- Select 32 KiB CHR-ROM bank at CPU $8000-$FFFF
              |+-+---- Select 32 KiB CHR-ROM bank at CPU $8000-$FFFF
 
              -------- 0=V mirroring, 1=H mirroring
Mirroring seems to be hard-wired to vertical for all known images.

Latest revision as of 19:13, 16 August 2023

NES 2.0 Mapper 288 is used for two GKCX1 21-in-1 multicarts. Oddly, GoodNES 3.23b has them set to INES Mapper 133 even though it is entirely incompatible with that mapper.

Address latch

A~1... .... ..MP PCCC
              || |+++- Select 8 KiB CHR-ROM bank at PPU $0000-$1FFF
              |+-+---- Select 32 KiB CHR-ROM bank at CPU $8000-$FFFF
              -------- 0=V mirroring, 1=H mirroring