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