INES Mapper 207

iNES Mapper 207 represents the board used for Fudou Myouou Den.

It modifies Taito's X1-005 (80) in the exact same way that TLSROM (118) differs from MMC3 (4), by which we mean the X1-005's CHR A17 output is connected to CIRAM A10. Thus, it achieves 1scA/1scB/H controllable mirroring instead of H/V.

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 =  Mapper 207          =
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  Registers:
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   $7EF0:  [MCCC CCCC]
      M = Mirroring 0
      C = CHR Reg 0
 
   $7EF1:  [MCCC CCCC]
      M = Mirroring 1
      C = CHR Reg 1
 
   $7EF2-7EF5:  CHR Regs 2-5

   $7EF6-7EF7:  was old mirroring control register, now ignored

   $7EF8-7EFF:  see iNES Mapper 080
 
 CHR Setup:
 ---------------------------
 
        $0000   $0400   $0800   $0C00   $1000   $1400   $1800   $1C00 
      +---------------+---------------+-------+-------+-------+-------+
      |    <$7EF0>    |    <$7EF1>    | $7EF2 | $7EF3 | $7EF4 | $7EF5 |
      +---------------+---------------+-------+-------+-------+-------+
 
 Mirroring:
 ---------------------------
 
   [ $7EF0 ][ $7EF0 ]
   [ $7EF1 ][ $7EF1 ]
 
 Mirroring bit of appropriate reg selects NTA or NTB