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Configure and Environment Commands
A
ENV Parameter and Options
ENV asks the following series of questions to set up the VMEbus interface for the
MVME162LX modules. You should have a working knowledge of the VMEchip2 as
given in the MVME162LX Embedded Controller Programmer's Reference Guide in order to
perform this configuration. Also included in this series are questions for setting ROM
and Flash access time.
The slave address decoders are used to allow another VMEbus master to access a local
resource of the MVME162LX. There are two slave address decoders set. They are set up
as follows:
Slave Enable #1 [Y/N]
Slave Starting Address #1
Slave Ending Address #1
Slave Address Translation
Address #1
Slave Address Translation
Select #1
Slave Control #1
Slave Enable #2 [Y/N]
Slave Starting Address #2
A-10
Table A-1. ENV Command Parameters (Continued)
Default
00000000
000FFFFF
00000000
00000000
03FF
00000000
Meaning of Default
Y
Yes, set up and enable Slave Address
Decoder #1.
Base address of the local resource that is
accessible by the VMEbus. Default is the
base of local memory, $0.
Ending address of the local resource that
is accessible by the VMEbus. Default is
the end of calculated memory.
Register that allows the VMEbus address
and the local address to be different. The
value in this register is the base address of
local resource that is associated with the
starting and ending address selection
from the previous questions. Default is 0.
Register that defines which bits of the
address are significant. A logical one ''1''
denotes significant address bits, a logical
zero ''0'' non-significant bits. Default is 0.
Defines the access restriction for the
address space defined with this slave
address decoder. Default is $03FF.
N
Do not set up and enable Slave Address
Decoder #2.
Base address of the local resource that is
accessible by the VMEbus. Default is 0.
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