EXDOS by pear
It is a clone card EXDOS. Compact version designed by pear. It includes the Bus Bridge on-board.
Jumper J9 near a power socket:
- Short: card and a EP powered with a common power supply connected to the card,
- Open: card and a computer powered with separate power supplies.
Do not connect the interface to the computer when the power is on !
The original Enterprises power supply does not have enough power to both the computer and the card !
If you want to use a single, common AC adapter should provide 9V voltage and current of about 3 - 4A. In the case of the power supply connected direct to the card's polarity can be any (the card has a diode bridge).