(r) this line goes to the ROM only.
(s) this line is Shared between the ROM, MMC/chip, and Nintendo
(n) this line connects to the NES cart edge only, and not the ROM
(w) this line connects to the WRAM only and nowhere else


MMC1 Chip:    (24 pin shrink-DIP) [Made by Kevin Horton (khorton@iquest.net)]
----------
Comes in several varieties: 'MMC1', 'MMC1A', and 'MMC1B2'                                  

                                  .---\/---.
                    PRG A14 (r) - |01    24| - +5V
                    PRG A15 (r) - |02    23| - M2        
                    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)
                                  `--------'

                                     MMC1