(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 ([email protected])]
----------
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

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