INES Mapper 058

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 Here are Disch's original notes:  
 ========================
 =  Mapper 058          =
 ========================
 
 Example Games:
 --------------------------
 68-in-1 (Game Star)
 Study and Game 32-in-1
 
 
 Registers:
 ---------------------------
 
   $8000-FFFF:  A~[.... .... MOCC CPPP]
     P = PRG page select
     C = CHR page select (8k @ $0000)
     O = PRG Mode
     M = Mirroring (0=Vert, 1=Horz)
 
 
 PRG Setup:
 ---------------------------
 
                $8000   $A000   $C000   $E000  
              +-------------------------------+
 PRG Mode 0:  |            <$8000>            |
              +-------------------------------+
 PRG Mode 1:  |     $8000     |     $8000     |
              +---------------+---------------+