INES Mapper 079

iNES Mapper 079 is used to designate the NINA-003/6 boards. Tengen's 800008 board functions identically,[1] even though the only game ever to use it was Tetяis: The Soviet Mind Game, which uses the subset of functionality shared with CNROM.

 Here are Disch's original notes:  
 ========================
 =  Mapper 079          =
 ========================
 
 Example Games:
 --------------------------
 Blackjack
 Dudes with Attitude
 F-15 City War
 Krazy Kreatures
 
 
 
 Registers:
 ---------------------------
 
 Range,Mask:   $4100-5FFF, $4100
 
    be sure to make note of the mask -- $4200 does not map to the register, but $4300 does.
 
 
   $4100:  [.CPP PCCC]
     C = CHR Reg (8k @ $0000)
     P = PRG Reg (32k @ $8000)
 
 Note the high bit of the CHR Reg.

The largest game in BootGod's database is 64k/64k and its hardware only has 4 bits of state, mapped as

   $4100:  [.... PCCC]     with the same meaning as above.

Note that FCEUX's implementation maps the register as

   $4100:  [CCCC XCCC]
     X = PRG Reg (32k @ $8000)
    all 8 bits = CHR Reg (8k @ $0000)
   $8000:  [CCCC CCCC]
     C = CHR Reg (8k @ $8000)