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6Modifying the Environment
Overview
You can use the factory-installed debug monitor, PPCBug, to modify
certain parameters contained in the PrPMC750's Non-Volatile RAM
(NVRAM), also known as Battery Backed-up RAM (BBRAM). NVRAM
is located in the last 32K of Flash Bank A on the PrPMC750.
The CNFG and ENV commands are both described in the PPCBug
Firmware Package User's Manual. 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.
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.
6
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