1 Introducing the SBE/S SBus Card

The Sun Microsystems SBE/S SBus card provides a high performance SCSI interface and an Ethernet channel in a single SBus slot. By combining commonly used functions in a single, low-cost card, the SBE/S card improves the utilization of SBus slots. Because both AUI and twisted-pair Ethernet are available options, this one card meets many configuration requirements.

The SBE/S SBus card is designed for operation in systems that are running SunOS version 4.1.2 or later, and are compatible with the Open Boot PROM version 2.0 and later or systems running Solaris 2.x, or another compatible operating system. An on-board FCode PROM provides configuration support that identifies the SBE/S SBus card to the system and contains selftest routines.

The SCSI interface has these features:

• 25 MHz clock rate

• SCSI-2 support

• support of 10-byte commands for Group 2

• bus-initiated selection receives these message bytes:

-1 byte of identify and

-3 bytes of queue tag nexus

• SCSI bus asynchronous data transfers:

• up to 6 Mbytes per second

• SCSI bus synchronous data transfers:

• up to 5 Mbytes per second

• single-ended SCSI interface

• maximum cable length of 19.685-feet (6-meters)

• support for up to seven devices

• termination power with fuse protection

The Ethernet interface has these features:

• 128 Kbyte static Ethernet memory

• thick Ethernet (AUI) support

• twisted-pair (10 baseT) Ethernet support

• 10 Mbit per second transfer rate

• byte, halfword, and 8 halfword DMA bursts to Ethernet memory

• an adapter cable from the onboard 14-pin champ connector to the 15-pin AUI connector

• an adapter cable from the onboard 14-pin champ connector to the RJ45 twisted-pair connector

• provides operations of up to 100 meters of twisted-pair without the use of a repeater

• detection and correction of wrong polarity on the twisted-pair medium

The SCSI/Buffered Ethernet SBus card is available for all SPARCsystem 600MP products.