Technical data

3-8 Computer Group Literature Center Web Site
177Bug Firmware
3
Modifying the Environment
You can use the factory-installed debug monitor, 177Bug, to modify
certain parameters contained in the MVME177P’s Non-Volatile RAM
(NVRAM), also known as Battery Backed-Up RAM (BBRAM).
❏ The Board Information Block in NVRAM contains various entries
that define operating parameters of the board hardware. Use the
177Bug command CNFG to change those parameters.
❏ Use the 177Bug command ENV to change configurable 177Bug
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 177Bug firmware, along with the
parameters that you can modify with the ENV command.
CNFG - Configure Board Information Block
Use this command to display and configure the Board Information Block
which resides within the NVRAM. The board information block contains
various elements that correspond to specific operational parameters of the
MVME177P board.
The board structure for the MVME177P is as follows:
177-Bug>cnfg
Board (PWA) Serial Number = " "
Board Identifier = " "
VE Verify S-Records Against Memory
VER Display Revision/Version
WL Write Loop
Table 3-2. Debugger Commands (Continued)
Command Description