Taito X1-017

 Here are Disch's original notes:  
 ========================
 =  Mapper 082          =
 ========================
 
 
 Example Games:
 --------------------------
 SD Keiji - Blader
 Kyuukyoku Harikiri Stadium
 
 
 Notes:
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 Regs appear at $7EFx, I'm unsure whether or not PRG-RAM can exist at $6000-7FFF
 
 
 Registers:
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   $7EF0-7EF5:  CHR Regs
 
   $7EF6:  [.... ..CM]  CHR Mode/Mirroring
     C = CHR Mode select
     M = Mirroring:
        0 = Horz
        1 = Vert
 
   $7EFA:  [PPPP PP..]  PRG Reg 0 (8k @ $8000)
   $7EFB:  [PPPP PP..]  PRG Reg 1 (8k @ $A000)
   $7EFC:  [PPPP PP..]  PRG Reg 2 (8k @ $C000)
 
 
 CHR Setup:
 ---------------------------
 
                 $0000   $0400   $0800   $0C00   $1000   $1400   $1800   $1C00 
               +---------------+---------------+-------+-------+-------+-------+
 CHR Mode 0:   |    <$7EF0>    |    <$7EF1>    | $7EF2 | $7EF3 | $7EF4 | $7EF5 |
               +---------------+---------------+---------------+---------------+
 CHR Mode 1:   | $7EF2 | $7EF3 | $7EF4 | $7EF5 |    <$7EF0>    |    <$7EF1>    |
               +-------+-------+-------+-------+---------------+---------------+
 
 
 PRG Setup:
 ---------------------------
 
       $8000   $A000   $C000   $E000  
     +-------+-------+-------+-------+
     | $7EFA | $7EFB | $7EFC | { -1} |
     +-------+-------+-------+-------+
 
 Note:  remember that the low 2 bits are not used (right-shift written values by 2)