Technical data

Modifying the Environment

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Modifying the Environment

You can use the factory-installed debug monitor, 172Bug, to modify

certain parameters contained in the MVME172LX’s Non-Volatile RAM

(NVRAM), also known as Battery Backed-Up RAM (BBRAM).

❏ The Board Information Block in NVRAM contains various

elements concerning operating parameters of the hardware. Use the

172Bug command CNFG to change those parameters.

❏ Use the 172Bug command ENV to change configurable 172Bug

parameters in NVRAM.

The CNFG and ENV commands are both described in the Debugging

Package for Motorola 68K CISC CPUs User’s Manual. Refer to that

manual for general information about their use and capabilities.

The following paragraphs present supplementary information on CNFG

and ENV that is specific to the 172Bug debugger, along with the

parameters that can be configured with the ENV command.

CNFG - Configure Board Information Block

Use this command to display and configure the Board Information Block

which is resident within the NVRAM. The board information block

contains various elements that correspond to specific operational

parameters of the MVME172LX board. The board structure for the

MVME172LX is as follows:

172-Bug>cnfg

Board (PWA) Serial Number = " "

Board Identifier = " "

Artwork (PWA) Identifier = " "

MPU Clock Speed = " "

Ethernet Address = 08003E200000

Local SCSI Identifier = " "

Parity Memory Mezzanine Artwork (PWA) Identifier = " "

Parity Memory Mezzanine (PWA) Serial Number = " "

Static Memory Mezzanine Artwork (PWA) Identifier = " "

Static Memory Mezzanine (PWA) Serial Number = " "