Laptop User Manual

4-1

4CNFG and ENV Commands

Overview

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

certain parameters contained in the PowerPC board’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 configured PPCBug

parameters in NVRAM.

The CNFG and ENV commands are both described in the PPCBug

Firmware Package User’s Manual (part number PPCBUGA1/UM). 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.