INES Mapper 046
This mapper represents the Rumble Station, a combined NES-on-a-Chip and multicart of licensed Color Dreams games. The outer mapper, selecting 64K CHR ROM banks (bits 7-4) and 64K PRG ROM banks (bits 3-0), is at $6000-$7FFF, and the inner mapper is a size-reduced subset of Color Dreams (#11). Together, this supports up to 1 MB PRG ROM and 1 MB CHR ROM.
Here are Disch's original notes:
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= Mapper 046 =
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Example Game:
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Rumblestation 15-in-1
Bus Conflicts?:
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No idea whether or not this mapper suffers from bus conflicts. Use caution!
Registers:
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Regs at $6000-7FFF means no PRG-RAM.
$6000-7FFF: [CCCC PPPP] High CHR, PRG bits
$8000-FFFF: [.CCC ...P] Low CHR, PRG bits
'C' selects 8k CHR @ $0000
'P' select 32k PRG @ $8000
Powerup:
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$6000 set to 0 on powerup.
Nestopia and FCEUX reset both registers, not just the outer bank.