Motorola MVME187 manual Table A-1. ENV Command Parameters Continued

Models: MVME187

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Setting Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)

 

ENV Parameter and Options

Default

 

Meaning of Default

 

 

 

 

 

Network Auto Boot ConÞguration

00000000

This is the address where the network

 

Parameters Pointer (NVRAM)

 

interface conÞguration parameters

 

 

 

are to be saved in NVRAM; these

 

 

 

parameters are the necessary

 

 

 

parameters to perform an unattended

 

 

 

network boot.

 

 

 

!

 

If you use the NIOT

 

 

 

 

debugger command, these

 

 

 

Caution

parameters need to be

 

 

 

saved in the NVRAM,

 

 

 

 

 

 

 

 

 

 

somewhere in the address

 

 

 

 

 

range $FFFC0000 through

 

 

 

 

 

$FFFC0FFF. The NIOT

 

 

 

 

 

parameters do not exceed

 

 

 

 

 

128 bytes in size. The

 

 

 

 

 

location for these

 

 

 

 

 

parameters is determined

 

 

 

 

 

by setting this ENV

 

 

 

 

 

pointer. If you have used

 

 

 

 

 

the exact same space for

 

 

 

 

 

your own program

 

 

 

 

 

information or

 

 

 

 

 

commands, they will be

 

 

 

 

 

overwritten and lost.

 

 

 

 

 

Memory Search Starting Address

00000000

Where the Bug begins to search for a

 

 

 

work page (a 64KB block of memory)

 

 

 

to use for vector table, stack, and

 

 

 

variables. This must be a multiple of

 

 

 

the debugger work page, modulo

 

 

 

$10000 (64KB). In a multi-187

 

 

 

environment, each MVME187 board

 

 

 

could be set to start its work page at a

 

 

 

unique address to allow multiple

 

 

 

debuggers to operate simultaneously

 

 

 

from the same memory.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Motorola MVME187 manual Table A-1. ENV Command Parameters Continued