INES Mapper 078

 Here are Disch's original notes:  
 ========================
 =  Mapper 078          =
 ========================
 
 
 Example Games:
 --------------------------
 Holy Diver
 Uchuusen - Cosmo Carrier
 
 
 Notes:
 ---------------------------
 This mapper number covers two seperate mappers which are *almost* identical... however the mirroring control
 on each is different (making them incompatible).  You'll probably have to do a CRC or Hash check to figure
 out which mirroring setup to use.
 
 I think some emus might also look at the mirroring bit in the iNES header to determine which setup to use --
 however the ROMs I have do not seem to have the mirroring bit set differently, so I don't know how well that
 would work (not to mention it's probably not a good idea anyway).
 
 I'm unsure whether or not this mapper suffers from bus conflicts.  Use caution!
 
 
 Registers:
 ---------------------------
 
   $8000-FFFF:  [CCCC MPPP]
     C = CHR Reg (8k @ $0000)
     P = PRG Reg (16k @ $8000)
     M = Mirroring:
 
        --For Uchuusen - Cosmo Carrier--
         0 = 1ScA
         1 = 1ScB
 
        --For Holy Diver--
         0 = Horz
         1 = Vert
 
 
 PRG Setup:
 ---------------------------
 
       $8000   $A000   $C000   $E000  
     +---------------+---------------+
     |     $8000     |     { -1}     |
     +---------------+---------------+