INES Mapper 184: Difference between revisions
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m (Be precise about "board" vs "chip"/"IC" — the Sunsoft-1 IC was used on the Sunsoft-(K/4) boards, while the Sunsoft-2 IC was used on the Sunsoft-(3/3R) boards.) |
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[[Category:iNES Mappers]] | [[Category:iNES Mappers]][[Category:Discrete logic mappers]] | ||
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]]) | ||
This mapper is for a few games which use the Sunsoft-1 mapper | This mapper is for a few games which use the [[Sunsoft 1 pinout|Sunsoft-1 mapper]]. | ||
Fantasy Zone (J), despite using the Sunsoft-1 chip, is more easily emulated by [[iNES Mapper 093|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. | Fantasy Zone (J), despite using the Sunsoft-1 chip, is more easily emulated by [[iNES Mapper 093|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 [[INES_Mapper_DischDocs|disch's original style]]: | Here is the documentation in [[INES_Mapper_DischDocs|disch's original style]]: | ||
Revision as of 03:03, 13 June 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)
