iNES Mapper 114 is used for an MMC3-clone-bearing board with scrambled register addresses and indices, 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.
- Submapper 0:
- Aladdin (SuperGame, not Super Aladdin, and not to be confused with Aladdin from J.Y. Company)
- The Lion King (SuperGame)
- Pocohontos (Hosenkan, not to be confused with Pocahontas Part 2 from SuperGame)
- Super Donkey Kong (Hosenkan)
- Submapper 1 (different scrambling pattern):
- Boogerman (SuperGame, not to be confused with Boogerman II by Rex Soft)
Registers
NROM Override Register ($6000)
Mask: Probably $E001
D~7654 3210
---------
M.S. BBBb
| | ++++- Select 16 KiB PRG-ROM bank at CPU
| | $8000-$BFFF and $C000-$FFFF
| +------- 0: Do not replace bit 0 (NROM-128)
| 1: Replace bit 0 with CPU A14 (NROM-256)
+--------- 0: Use PRG bank from MMC3; ignore $6000 bits 0-3/5
1: Ignore PRG bank from MMC3; apply $6000 bits 0-3/5
Outer CHR-ROM Bank Register ($6001)
Mask: Probably $E001
D~7654 3210
---------
.... ...+- Select 256 KiB CHR-ROM bank at PPU $0000-$1FFF
MMC3-compatible registers ($8000-$FFFF)
Submapper 0
Address written MMC3 register meant
--------------- -------------------
$8000 $A001
$8001 $A000
$A000 $8000
$A001 $C000
$C000 $8001
$C001 $C001
$E000 $E000
$E001 $E001
$8000 index written MMC3 register meant
------------------- -------------------
0 0
1 3
2 1
3 5
4 6
5 7
6 2
7 4
Submapper 1
Address written MMC3 register meant
--------------- -------------------
$8000 $A001
$8001 $8001
$A000 $8000
$A001 $C001
$C000 $A000
$C001 $C000
$E000 $E000
$E001 $E001
$8000 index written MMC3 register meant
------------------- -------------------
0 0
1 2
2 5
3 3
4 6
5 1
6 7
7 4
Bits 6 and 7 of the value written to $8000 are unchanged. See MMC3 for further details.
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 that of the MMC3A, i.e. a latch value of zero disables the IRQ, on which Aladdin depends.
- Previous descriptions of Mapper 114/182 claim that a write to address $C001 is equivalent to writing both to an MMC3's $C000 and $C001 registers, and that writing to $A001 has no effect. A comparison of Aladdin (Mapper 114) and the Super Aladdin (Mapper 4, by the same developer) however indicates a one-to-one mapping, provided that MMC3A-like IRQ behavior is enforced.
Similar Mappers
- INES Mapper 115 has the same $6000 and $6001 registers, but does not scramble MMC3 register addresses and indices. Also, Mapper 115's IRQ behavior resembles that of the MMC3C, 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.
- INES Mapper 123 moves the $6000 register to $5800 while rearranging its bits and drops the outer CHR-ROM bank register at $6001 as well as register address scrambling while retaining index register scrambling (using the same pattern).
- INES Mapper 182 is a duplicate of Mapper 114. In fact, FCEUX explicitly reassigns Hosenkan's Mapper 182 ROMs to Mapper 114. Because Hosenkan's games make no use of the $6000-$6001 registers, other than writing zero to both of them on startup, some implementations (such as the EverDrive N8's) do not emulate the $600x registers.
- INES Mapper 215 extends and moves $6000/$6001 to $5000/$5001, and makes the MMC3 register address and index scrambling pattern selectable via $5007.
Categories: MMC3-like mappers, Mappers with scanline IRQs, NES 2.0 mappers with submappers