I/O+ Boards

1. Requirement - Reserve slot 1 for an I/O+ board (see Figure D-1). This is the only slot that allows direct access to the internal SCSI devices.

2. Maximum - Up to four graphics (UPA) cards are supported in a system.

3. Requirement - The SCSI bus on the I/O+ board in slot 1 must be terminated because it connects to the internal system SCSI bus.

4. An I/O+ board in a slot other than slot 1 does not require termination if no devices connect to the SCSI bus on that board.

Figure D-1 Board Slots and AC Power Supply