Sun Microsystems 6.0005E+11 manual Figure B-7SBus I/O Board

B

B.6 I/O Boards

There are several types of I/O boards.

The SBus I/O board includes two ASICs. Each ASIC provides two SBuses. Three SBus slots are available on this board for plug-in boards. The remaining SBus slots are used for onboard devices such as 10/100 Mbit/second twisted- pair Ethernet, Fast/Wide SCSI, and Fiber Channel interfaces. See Figure B-7.

SBus slot 2

SBus slot 1

Fiber interface 1

SBus slot 0

Fiber interface 0

Fast wide SCSI

Twisted-pair Ethernet

MII external transceiver

Figure B-7SBus I/O Board

The Graphics I/O board includes one UPA-64 Slave Frame Buffer and one SYSIO ASIC that provides one SBus for two SBus slots for two plug-in cards. The remaining SBus slots are used for onboard devices such as 10/100 Mbyte/second twisted-pair Ethernet, Fast/Wide SCSI, and Fibre Channel interfaces. See Figure B-8.

B-10 Ultra Enterprise 6000/5000/4000 Systems Manual—November 1996