Keyboard/Gamepad Interface v1 fix
For Mega Drive version ONLY
While the NES flavour of the Keyboard/Gamepad Interface board works flawlessly, a bug is present on the MD version v1 revision of this board. Please use the workaround described below:
This workaround is for the Mega Drive version of the Interface; do NOT apply these mods to the NES version.
- Disconnect pin 11 of U9 in the Interface board (either bending or cutting the IC's leg, or by removing the corresponding socket pin -- this pin should be NOT in contact with the board.
- On the back of the board, make a bridge between pins 11 and 12 of U9, as shown on the pictures below.