Personal Computer User Manual

Functional Description

MVME197LEIG/D1 1-11

The Ethernet Station Address is displayed on a label attached to the VMEbus

P2 connector. In addition, the eight bytes including the Ethernet address are

stored in the configuration area of the BBRAM, with the two lower bytes of

those set to 0. That is, 08003E2XXXXX0000 is stored in the BBRAM. At an

address of $FFFC1F2C, the upper four bytes (08003E2X) can be read. At an

address of $FFFC1F30, the lower four bytes (XXXX0000) can be read. Refer to

the BBRAM, TOD Clock memory map description later in this chapter. The

MVME197LE debugger has the capability to retrieve or set the Ethernet

address.

If the data in the BBRAM is lost, the user should use the number on the

VMEbus P2 connector label to restore it. Refer to the MVME197BUG 197Bug

Debugging Package User’s Manual.

The Ethernet transceiver interface is located on the MVME197LE main

module, and the industry standard connector is located on the MVME712X

transition module.

Support functions for the 82596CA are provided by the PCCchip2. Refer to the

82596CA LAN Coprocessor User’s Manual and to the PCCchip2 chapter in the

MVME197LE, MVME197DP, and MVME197SP Single Board Computers

Programmer’s Reference Guide for detailed programming information.

SCSI Interface

The MVME197LE provides for mass storage subsystems through the industry-

standard SCSI bus. These subsystems may include hard and floppy disk

drives, streaming tape drives, and other mass storage devices. The SCSI

interface is implemented using the NCR 53C710 SCSI I/O controller.

Support functions for the 53C710 are provided by the PCCchip2. Refer to the

NCR 53C710 SCSI I/O Processor Data Manual and to the PCCchip2 chapter in the

MVME197LE, MVME197DP, and MVME197SP Single Board Computers

Programmer’s Reference Guide for detailed programming information.

SCSI Termination

The system configurer must ensure that the SCSI bus is terminated properly.

On the MVME197LE, the terminators are located on the P2 transition board.

The +5V power to the SCSI bus termination resistors is provided by the P2

transition board.