Difference between revisions of "INES Mapper 187"
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NewRisingSun (Talk | contribs) (Garō Densetsu Special (Kǎshèng re-release) is actually INES Mapper 115, allowing the removal of an ugly heuristic from Mapper 187's definition.) |
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{{DEFAULTSORT:187}}[[Category:MMC3-like mappers]][[Category:Mappers using $4020-$5FFF]][[Category:Mappers with scanline IRQs]] | {{DEFAULTSORT:187}}[[Category:MMC3-like mappers]][[Category:Mappers using $4020-$5FFF]][[Category:Mappers with scanline IRQs]] | ||
| − | iNES Mapper 187 is used for the 卡聖 (Kǎshèng) A98402 and similar boards, an [[MMC3]]-clone-bearing board with an NROM-like PRG-ROM register that can override the MMC3 clone's PRG-ROM bank. Used by: | + | iNES Mapper 187 is used for the 卡聖 (Kǎshèng) A98402 and similar boards, an [[MMC3]]-clone-bearing board with an NROM-like PRG-ROM register that can override the MMC3 clone's PRG-ROM bank, and supports 512 KiB of CHR-ROM. Used by: |
* ''Street Fighter Zero 2'' (Kǎshèng/Hummer Team, not ''Street Fighter Zero 2 '97'') | * ''Street Fighter Zero 2'' (Kǎshèng/Hummer Team, not ''Street Fighter Zero 2 '97'') | ||
* ''The King of Fighters '96'' (Kǎshèng/Hummer Team) | * ''The King of Fighters '96'' (Kǎshèng/Hummer Team) | ||
| − | |||
=Registers= | =Registers= | ||
| − | ==NROM Override Register ($5000 | + | ==NROM Override Register ($5000)== |
| − | Mask: Unknown | + | Mask: Unknown, probably $F000 |
D~7654 3210 | D~7654 3210 | ||
--------- | --------- | ||
| − | + | M.NB BBb. | |
| − | || | + | | |+-+++-- Select 16 KiB PRG-ROM bank at CPU |
| − | + | | | $8000-$BFFF and $C000-$FFFF | |
| − | + | | +------- 0: Do not replace bit 1 (NROM-128) | |
| − | | | + | | 1: Replace bit 1 with CPU A14 (NROM-256) |
| − | + | +--------- 0: Use PRG bank from MMC3; ignore $5000 bits 1-4/5 | |
| − | + | 1: Ignore PRG bank from MMC3; apply $5000 bits 1-4/5 | |
| − | +--------- 0: Use PRG bank from MMC3; ignore $ | + | |
| − | 1: Ignore PRG bank from MMC3; apply $ | + | |
| − | + | ||
| − | + | ||
==Protection Read ($5000-$5FFF)== | ==Protection Read ($5000-$5FFF)== | ||
Revision as of 05:47, 10 May 2019
iNES Mapper 187 is used for the 卡聖 (Kǎshèng) A98402 and similar boards, an MMC3-clone-bearing board with an NROM-like PRG-ROM register that can override the MMC3 clone's PRG-ROM bank, and supports 512 KiB of CHR-ROM. Used by:
- Street Fighter Zero 2 (Kǎshèng/Hummer Team, not Street Fighter Zero 2 '97)
- The King of Fighters '96 (Kǎshèng/Hummer Team)
Contents
Registers
NROM Override Register ($5000)
Mask: Unknown, probably $F000
D~7654 3210
---------
M.NB BBb.
| |+-+++-- Select 16 KiB PRG-ROM bank at CPU
| | $8000-$BFFF and $C000-$FFFF
| +------- 0: Do not replace bit 1 (NROM-128)
| 1: Replace bit 1 with CPU A14 (NROM-256)
+--------- 0: Use PRG bank from MMC3; ignore $5000 bits 1-4/5
1: Ignore PRG bank from MMC3; apply $5000 bits 1-4/5
Protection Read ($5000-$5FFF)
Mask: Unknown
The actual values that are returned are unknown; The King of Fighters '96 reads from here and only expects bit 7 of the value being returned to be set.
CHR A18 Control ($8000-$9FFF, even)
Mask: $E001
D~7654 3210
---------
M... ....
+--------- Select CHR A18 Mode
0: CHR A18=inverted PPU A12
1: CHR A18=PPU A12
Basically, either sprites or background tiles will come from the the second 256 KiB of CHR-ROM. Note that setting bit 7 will still also activate the MMC3 clone's CHR A12 inversion.
MMC3-compatible registers ($8000-$FFFF)
Mask: $E001, see MMC3.
Errata
- GoodNES 3.23b has several INES Mapper 121 and INES Mapper 189 images erroneously set to 187.
