INES Mapper 232

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 Here are Disch's original notes:  
 ========================
 =  Mapper 232          =
 ========================
 
 Example Games:
 --------------------------
 Quattro Adventure
 Quattro Sports
 Quattro Arcade
 
 
 Notes:
 --------------------------
 This is another Camerica/Codemasters mapper like 071.  Like 071, this mapper also involves a custom lockout
 defeat circuit which is mostly unimportant for emulation purposes.  Details will not be mentioned here, but
 are outlined in Kevtris' Camerica Mappers documentation.
 
 
 Registers:
 ---------------------------
 
  $8000-BFFF:   [...B B...]   PRG Block Select
 
  $C000-FFFF:   [.... ..PP]   PRG Page Select
     
 
 PRG Setup:
 ---------------------------
 
 Pages are taken from the 64k block currently selected by $8000.
 
       $8000   $A000   $C000   $E000  
     +---------------+---------------+
     |     $C000     |     { 3 }     |
     +---------------+---------------+