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Set Environment to Bug/Operating System

A-9

Memory ConÞguration Defaults:
The default conÞguration for Dynamic RAM mezzanine boards will position the 
mezzanine with the largest memory size to start at the address selected with the ENV 
parameter ÔÔBase Address of Dynamic MemoryÕÕ. The Base Address parameter defaults 
to 0. The smaller sized mezzanine will follow immediately above the larger in the 
memory map. If mezzanines of the same size and type are present, the Þrst (closest to 
the board) is mapped to the selected base address. If mezzanines of same size but with 
different type (parity and ECC) are present, the parity type will be mapped to the 
selected base address and the ECC type mezzanine will follow. The SRAM does not 
default to a location in the memory map that is contiguous with Dynamic RAM.

Base Address of Dynamic 
Memory

00000000

Beginning address of Dynamic Memory 
(Parity and/or ECC type memory). It 
must be a multiple of the Dynamic 
Memory board size, starting with 0. 
Default is $0. 

Size of Parity Memory 

00100000 

This is the size of the Parity type dynamic 
RAM mezzanine, if any. The default is the 
calculated size of the Dynamic memory 
mezzanine board. 

Size of ECC Memory Board 0

00000000 

This is the size of the Þrst ECC type 
memory mezzanine. The default is the 
calculated size of the memory mezzanine. 

Size of ECC Memory Board 1

00000000 

This is the size of the second ECC type 
memory mezzanine. The default is the 
calculated size of the memory mezzanine. 

Base Address of Static 
Memory

FFE00000

This is the beginning address of SRAM. 
The default is FFE00000 for the onboard 
128KB SRAM, or E1000000 for the 2MB 
SRAM mezzanine. If only 2MB SRAM is 
present, it defaults to address 00000000.

Size of Static Memory

00080000

This is the size of the SRAM type memory 
present. The default is the calculated size 
of the onboard SRAM or an SRAM type 
mezzanine.