INES Mapper 246
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Here are Disch's original notes: ======================== = Mapper 246 = ======================== Example Game: -------------------------- Fong Shen Bang - Zhu Lu Zhi Zhan Notes: -------------------------- Regs lie at $6000-67FF, but SRAM exists at $6800-7FFF. Don't know if there's only 6k of SRAM, or if there's 8k, but the first 2k is inaccessable. I find the latter more likely. Registers: --------------------------- Range,Mask: $6000-67FF, $6007 $6000-6003: PRG Regs $6004-6007: CHR Regs CHR Setup: --------------------------- $0000 $0400 $0800 $0C00 $1000 $1400 $1800 $1C00 +---------------+---------------+---------------+---------------+ | $6004 | $6005 | $6006 | $6007 | +---------------+---------------+---------------+---------------+ PRG Setup: --------------------------- $8000 $A000 $C000 $E000 +-------+-------+-------+-------+ | $6000 | $6001 | $6002 | $6003 | +-------+-------+-------+-------+ Powerup/Reset: --------------------------- $6003 set to $FF on powerup (and probably reset, but not sure).