Bandai Datach pinout
Bandai Datach: 32-pin 0.1" card edge (iNES Mapper 157)
**CHR A13 <- | 1 32 | -- +5V
PRG A16 <- | 2 31 | -> ??CHR A12??
PRG A15 <- | 3 30 | -> PRG A17
CPU A12 <- | 4 29 | -> PRG A14
CPU A7 <- | 5 28 | -> CPU A13
CPU A6 <- | 6 27 | -> CPU A8
CPU A5 <- | 7 26 | -> CPU A9
CPU A4 <- | 8 25 | -> CPU A11
CPU A3 <- | 9 24 | -> /ExternalROMRead
CPU A2 <- | 10 23 | -> CPU A10
CPU A1 <- | 11 22 | <> I2C SDA
CPU A0 <- | 12 21 | <> CPU D7
CPU D0 <> | 13 20 | <> CPU D6
CPU D1 <> | 14 19 | <> CPU D5
CPU D2 <> | 15 18 | <> CPU D4
GND -- | 16 17 | <> CPU D3
Notes:
- Pin 1 is used for the external I²C EEPROM clock.
- Pin 31 is Naruko’s educated guess
This is almost the standard JEDEC ROM pin order.
Source: Naruko