
========================
=  Mapper 061          =
========================

Example Game:
--------------------------
20-in-1


Registers:
---------------------------

  $8000-FFFF:  A~[.... .... M.LO HHHH]
    H = High 4 bits of PRG Reg
    L = Low bit of PRG Reg
    O = PRG Mode
    M = Mirroring (0=Vert, 1=Horz)


PRG Setup:
---------------------------

PRG Reg is 5 bits -- combination of 'H' and 'L' bits.

               $8000   $A000   $C000   $E000  
             +-------------------------------+
PRG Mode 0:  |            <$8000>            |
             +-------------------------------+
PRG Mode 1:  |     $8000     |     $8000     |
             +---------------+---------------+
