(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