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6Environment Modification
Overview
You can use the factory-installed debug monitor, PPCBug, to modify
certain parameters contained in the MVME240x’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
PPCBug command CNFG to change those parameters.
❏ Use the PPCBug command ENV to change configurable PPCBug
parameters in NVRAM.
The CNFG and ENV commands are both described in the PPCBug
Firmware Package User’s Manual, listed in Appendix D, Related
Documentation. Refer to that manual for general information about their
use and capabilities.
The following paragraphs present additional information about CNFG and
ENV that is specific to the PPCBug debugger, along with the parameters
that can be configured with the ENV command.
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