PT8154 pinout
PT8154, used on one version of iNES Mapper 189, 0.6" DIP-28. MMC3 clone without IRQ, PRG RAM, or PRG banking. Pin order matches MMC3.
.--\/--.
CHR A10 <- |01 28| -- VCC
PPU A12 -> |02 27| -> CHR A16
PPU A11 -> |03 26| -> CHR A11
PPU A10 -> |04 25| <- CPU D3
CHR A13 <- |05 24| <- CPU D2
CHR A14 <- |06 23| <- CPU D4
CHR A12 <- |07 22| <- CPU D1
CIRAM A10 <- |08 21| <- CPU D5
CHR A15 <- |09 20| <- CPU D0
/ROMSEL -> |10 19| <- CPU D6
R/W -> |11 18| <- CPU A0
CPU A14 -> |12 17| <- CPU D7
GND -- |13 16| <- M2
CPU A13 -> |14 15| -> PRG /CE
'------'
PT8154
Source: [1]