Bandai Datach pinout
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Bandai Datach: 32-pin 0.1" card edge (iNES Mapper 157)
1 o external I2C SCL |17 s +5V 2 o PRG A16 |18 o sub cartridge expansion? 3 o PRG A15 |19 o PRG A17 4 o CPU A12 |20 o PRG A14 5 o CPU A7 |21 o CPU A13 6 o CPU A6 |22 o CPU A8 7 o CPU A5 |23 o CPU A9 8 o CPU A4 |24 o CPU A11 9 o CPU A3 |25 o Program EN# 10 o CPU A2 |26 o CPU ROM A10 11 o CPU A1 |27 IO I2C SDA 12 o CPU A0 |28 i CPU D7 13 i CPU D0 |29 i CPU D6 14 i CPU D1 |30 i CPU D5 15 i CPU D2 |31 i CPU D4 16 s GND |32 i CPU D3
This is almost the standard JEDEC ROM pin order.
Source: Naruko