INES Mapper 007

iNES Mapper 007 is used to designate the AxROM boardset.

 Here are Disch's original notes:
 ========================
 =  Mapper 007          =
 ========================
 
 aka
 --------------------------
 AxROM
 
 
 Example Games:
 --------------------------
 Battletoads
 Time Lord
 Marble Madness
 
 
 Notes:
 ---------------------------
 AMROM and AOROM have bus conflicts, ANROM does not
 AMROM and ANROM are capped at 128k PRG
 AOROM is capped at 256k PRG
 
 There is no CHR swapping.  Every mapper 007 game I've ever seen has CHR-RAM.
 
 
 Registers (**BUS CONFLICTS** sometimes):
 --------------------------
   $8000-FFFF:  [...M .PPP]
     M = Mirroring:
         0 = 1ScA
         1 = 1ScB
 
     P = PRG Reg  (only 2 bits wide on AMROM/ANROM)
 
 
 PRG Setup:
 --------------------------
 
       $8000   $A000   $C000   $E000  
     +-------------------------------+
     |             $8000             |
     +-------------------------------+