(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
MMC2 Chip: (40/42 pin shrink-DIP) [Made by Kevin Horton (
[email protected])]
----------
Comes in one flavour: 'MMC2 RD387-001'
.----\/----.
| |
GND - |XX XX| - +5V
M2 - |01 40| - +5V
PRG A14 (n) - |02 39| - GND
PRG A13 (n) - |03 38| - CIRAM A10 (n)
PRG A15 (r) - |04 37| - CHR A15 (r)
PRG A14 (r) - |05 36| - CHR A12 (r)
PRG A12 (s) - |06 35| - CHR A14 (r)
PRG A13 (r) - |07 34| - CHR A12 (n)
PRG A16 (r) - |08 33| - CHR A13 (r)
PRG /CE (r) - |09 32| - CHR A16 (r)
PRG D4 (s) - |10 31| - CHR A8 (s)
PRG D3 (s) - |11 30| - CHR A5 (s)
PRG D0 (s) - |12 29| - CHR A9 (s)
PRG D1 (s) - |13 28| - CHR A4 (s)
PRG D2 (s) - |14 27| - CHR A11 (s)
PRG R/W (n) - |15 26| - CHR A3 (s)
PRG /CE (n) - |16 25| - CHR A7 (s)
CHR /RD (s) - |17 24| - CHR A2 (s)
CHR A0 (s) - |18 23| - CHR A10 (s)
CHR A6 (s) - |19 22| - CHR A1 (s)
GND - |20 21| - CHR /CE (s)
| |
`----------'
MMC2
(note: the pins marked with 'X's are optional; they are only used if
the MMC2 were to be 42 pins instead of 40.)