INES Mapper 061

iNES Mapper 61 is used for three different multicart PCBs:

GS-2017: 8 KiB of unbanked CHR-RAM (submapper irrelevant): 方塊外傳 9合1 - Tetris Family 9-in-1
NTDEC 0324: 128 KiB of banked CHR-ROM (submapper 0): HQ 高品質合卡 15-in-1
NTDEC BS-N032: 256 KiB of banked CHR-ROM (submapper 1): 32-in-1

Address Latch ($8000-$FFFF, write)

A~[1... CCCC McpN PPPP]
        |||| |||| ++++- PRG A18..A15
        |||| |||+------ 0: PRG A14=CPU A14 (NROM-256)
        |||| |||        1: PRG A14=p (NROM-128)
        |||| ||+------- PRG A14 if M=1
        |||  |+-------- CHR A13 (submapper 1 only)
        |||| +--------- Mirroring, 0=Vertical, 1=Horizontal
        ++++----------- CHR A16..A13 (submapper 0)
                        CHR A17..A14 (submapper 1)

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