INES Mapper 184: Difference between revisions
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[[Category:iNES Mappers]][[Category:Discrete logic mappers]] | [[Category:iNES Mappers|184]][[Category:Discrete logic mappers|184]][[Category:in NesCartDB|184]] | ||
This is part of a family of Sunsoft mappers used largely by Japanese games: ([[iNES Mapper 089]], [[iNES Mapper 093]], [[iNES Mapper 184]]) | This is part of a family of Sunsoft mappers used largely by Japanese games: ([[iNES Mapper 089]], [[iNES Mapper 093]], [[iNES Mapper 184]]) | ||
Revision as of 18:37, 29 July 2012
This is part of a family of Sunsoft mappers used largely by Japanese games: (iNES Mapper 089, iNES Mapper 093, iNES Mapper 184)
This mapper is for a few games which use the Sunsoft-1 mapper.
Fantasy Zone (J), despite using the Sunsoft-1 chip, is more easily emulated by Mapper 093 because it was written to support execution using either the Sunsoft-2 IC and a variant board that used the Sunsoft-1 IC.
Despite the mapper existing as a single IC, its functionality is describable using a 74139, a 74174, and a 74157, and so should probably be considered discrete logic.
Here is the documentation in disch's original style:
Registers:
--------------------------
$6000-7FFF: [.HHH .LLL]
H = Selects 4k CHR @ $1000
L = Selects 4k CHR @ $0000
The most significant bit of H is always set in hardware. (i.e. its range is 4 to 7)
(There can be no SRAM because the register is mapped into $6000-7FFF)
