INES Mapper 115: Difference between revisions
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D~[MPN. PPPp] | D~[MPN. PPPp] | ||
||| ++++- If M=1: PRG | ||| ++++- If M=1: PRG A17..A14 | ||
||+------- 0: If M=1: PRG A14=p (NROM-128) | ||+------- 0: If M=1: PRG A14=p (NROM-128) | ||
|| 1: If M=1: PRG A14=CPU 14 (NROM-256) | || 1: If M=1: PRG A14=CPU 14 (NROM-256) | ||
|+-------- PRG | |+-------- PRG A18 | ||
+--------- 0: MMC3 mode, PRG | +--------- 0: MMC3 mode, PRG A17..A14=MMC3 PRG A17..A14 | ||
1: NROM mode, PRG | 1: NROM mode, PRG A17..A14=PPPp and "N" bit applies | ||
Power-on value: $00 | Power-on value: $00 | ||
==Outer CHR-ROM Bank Register ($6001, write)== | ==Outer CHR-ROM Bank Register ($6001, write)== | ||
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D~[.... ...C] | D~[.... ...C] | ||
+- CHR | +- CHR A18 | ||
Power-on value: $00 | Power-on value: $00 | ||
==Solder Pad Register ($6002, read)== | ==Solder Pad Register ($6002, read)== | ||
Latest revision as of 14:21, 17 February 2024
iNES Mapper 115 denotes the 卡聖 (Kǎshèng) SFC-02B/-03/-004 boards, bearing an MMC3-clone with a 256 KiB outer CHR-ROM bank register and an NROM-like PRG-ROM register that can override the MMC3 clone's PRG-ROM bank. Used by:
- A.V. 究極麻將 II (A.V. Jiūjí Májiàng II, Kǎshèng re-release, originally released by 哥德 (Gouder) on INES Mapper 116)
- 包青天 (Bāo Qīngtiān, Justice Pao)
- 餓狼伝説 Special (Garō Densetsu Special, Kǎshèng re-release, originally released by 哥德 (Gouder) on INES Mapper 116)
- 雷電 II - Thunderbolt Fighting Plane (Léidiàn II)
- 三國春秋: 四川省 (Sānguó Chūnqiū: Sìchuān Shěng)
- 幽☆遊☆白書 Final (Yū Yū Hakusho Final, both Chinese and English versions)
- 1997 Super HiK 16-in-1 multicart
Registers
Mode/NROM Bank Register ($6000, write)
Mask: $E003
D~[MPN. PPPp]
||| ++++- If M=1: PRG A17..A14
||+------- 0: If M=1: PRG A14=p (NROM-128)
|| 1: If M=1: PRG A14=CPU 14 (NROM-256)
|+-------- PRG A18
+--------- 0: MMC3 mode, PRG A17..A14=MMC3 PRG A17..A14
1: NROM mode, PRG A17..A14=PPPp and "N" bit applies
Power-on value: $00
Outer CHR-ROM Bank Register ($6001, write)
Mask: $E003
D~[.... ...C]
+- CHR A18
Power-on value: $00
Solder Pad Register ($6002, read)
Mask: $E003
D~[.... .VVV]
+++- Solder Pad value
MMC3-compatible registers ($8000-$FFFF)
Mask: $E001, see MMC3.
Notes
- Unlike many similar mappers, the $600x registers are not connected to the MMC3 clone's WRAM interface and thus function regardless of whether WRAM is enabled or not.
- IRQ behavior resembles "Sharp" behavior, i.e. a latch value of zero causes an IRQ on every scanline, on which the Chinese version of 幽☆遊☆白書 Final (Yuu Yuu Hakusho Final) depends.
Similar Mappers
- INES Mapper 114 has the same $6000 and $6001 registers, but additionally scrambles MMC3 register addresses and indices. Also, Mapper 114's IRQ behavior resembles "NEC" behavior, i.e. a latch value of zero disables IRQ.
- INES Mapper 187 has a similar NROM override register, placed at $5000
- INES Mapper 248 is a duplicate of Mapper 115.
