MMC2 pinout

MMC2 Chip: (40/42 pin shrink-DIP)

Later revisions of the chip are labelled MMC2-L and are 42 pin instead of 40 pin.

                 .--\/--.
          GND  - |XX  XX| -  +5V
  (n)      M2 -> |01  40| -  +5V
  (n) CPU A14 -> |02  39| -  GND
  (n) CPU A13 -> |03  38| -> CIRAM A10 (n)
  (r) PRG A15 <- |04  37| -> CHR A15 (r)
  (r) PRG A14 <- |05  36| -> CHR A12 (r)
 (rn) CPU A12 -> |06  35| -> CHR A14 (r)
  (r) PRG A13 <- |07  34| <- PPU A12 (n)
  (r) PRG A16 <- |08  33| -> CHR A13 (r)
  (r) PRG /CE <- |09  32| -> CHR A16 (r)
 (rn) CPU  D4 -> |10  31| <- PPU  A8 (rn)
 (rn) CPU  D3 -> |11  30| <- PPU  A5 (rn)
 (rn) CPU  D0 -> |12  29| <- PPU  A9 (rn)
 (rn) CPU  D1 -> |13  28| <- PPU  A4 (rn)
 (rn) CPU  D2 -> |14  27| <- PPU A11 (rn)
  (n) CPU R/W -> |15  26| <- PPU  A3 (rn)
  (n) /ROMSEL -> |16  25| <- PPU  A7 (rn)
 (rn) PPU /RD -> |17  24| <- PPU  A2 (rn)
 (rn) PPU  A0 -> |18  23| <- PPU A10 (rn)
 (rn) PPU  A6 -> |19  22| <- PPU  A1 (rn)
          GND  - |20  21| <- PPU A13 (rn)
                 `------'

(r) - this pin connects to the ROM chips
(n) - this pin connects to the NES connector