3Interface Devices and Mass-Storage Drives SCSI / LAN Combo Board

10BT/100TX PCI LAN Connector

The LAN adapter supports the following two standards: 100 VG-AnyLAN,

100Mbits per second over 4-pair, category-3, unshielded twisted pair (UTP), voice grade (VG) cable (IEEE 802.12 standard for Ethernet);

10BaseT, 10 Mbits per second, ISO 8802-3 (IEEE 802.3 standard). On the rear panel there is one RJ-45 unshielded-twisted-pair (UTP) connector. The 10BT/100TX LAN Features on page 62 are also valid for the 10 BT/100 TX PCI LAN controller.

Ultra wide (16-bit) SCSI connector

SCSI Interface

The Symbios Logic SYM5C875J PCI-SCSI I/O Processor chip connects directly the SCSI bus and generates timing and protocol in compliance with the SCSI standard.

The SCSI interface operates as 16-bit, synchronous or asynchronous, single- ended, and supports Ultra SCSI protocols and 16-bit arbitration. The interface is made through two (and only two) of the connectors J2, J3 and J4.

Connector

Description

Location

 

 

 

J2

Shielded 68-pin high density right-angle receptacle.

Protrudes through the

 

 

rear panel bracket.

 

 

 

J3

68-pin high density right-angle receptacle.

Internal connector at the

 

 

end of the board.

 

 

 

J4

External Start, SCSI Led and External SCSI cable

Internal connector at the

 

detection.

bottom right-hand-side of

 

 

the Combo card.

 

 

 

The Ultra wide 16-bit SCSI connector is for internal devices and has an address range from 0 to 15, with the SCSI address 0 used by the first SCSI hard disk drive and SCSI address 7 reserved for the integrated SCSI controller (the default for wide and narrow SCSI devices).

Data is transferred at 40 MB per second on 16-bit wide, single-ended bus. The controller is fitted with a 16-bit SCSI flat cable with five connectors, plus a SCSI termination device; so a maximum of 4 internal wide-SCSI hard drives are supported.

59