MMC1 pinout

MMC1 Chip: (24 pin shrink-DIP)

Comes in several varieties: 'MMC1', 'MMC1A', and 'MMC1B2'

                                  .---\/---.
                   PRG A14 (r) <- |01    24|  - +5V
                   PRG A15 (r) <- |02    23| <- M2/Phi2/CPU Clk        
                   PRG A16 (r) <- |03    22| <- PRG A13 (s)
                   PRG A17 (r) <- |04    21| <- PRG A14 (n)
                   PRG /CE (r) <- |05    20| <- PRG /CE (n)
                   WRAM CE (w) <- |06    19| <- PRG D7 (s)
                   CHR A12 (r) <- |07    18| <- PRG D0 (s)
                   CHR A13 (r) <- |08    17| <- PRG R/W 
                   CHR A14 (r) <- |09    16| -> CIRAM A10 (n)
                   CHR A15 (r) <- |10    15| <- CHR A12 (n)
   CHR A16 (r) or WRAM /CE (w) <- |11    14| <- CHR A11 (s)
                           GND  - |12    13| <- CHR A10 (s)
                                  `--------'

(r) - this pin connects to the ROM chips only (n) - this pin connects to the NES connector only (s) - this pin is shared with the NES connector and ROM chips (w) - this pin connects to the WRAM only