Table of Contents
Advertisement
Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options
VMEC2 GCSR Group Base Address
VMEC2 GCSR Board Base Address
VMEbus Global Time Out Code
Local Bus Time Out Code
VMEbus Access Time Out Code
The special 166Bug parameters that can be configured using ENV are as follows.
VSBC2 Installed [Y/N]
VSBC2 Interrupt Vector Base
VSBC2 Local Interrupt Vector Base
VSBC2 Slave Starting Address #1
VSBC2 Slave Ending Address #1
MVME166IG/D2
Set Environment to Bug/Operating System
Default
Meaning of Default
CC
Specifies the group address
($FFFFXX00) in Short I/O for
this board. Default = $CC.
00
Specifies the base address
($FFFFCCXX) in Short I/O for
this board. Default = $00.
01
This controls the VMEbus
timeout when systems
controller. Default $01 = 64 s.
00
This controls the local bus
timeout. Default $00 = 8 s.
02
This controls the local bus to
VMEbus access timeout. Default
$02 = 32 ms.
Y
This is set depending on the
existence of a VSBchip2 on the
board. It can be overridden with
this ENV option.
0E
Vector passed back to the VSB
master during the Status/ID
transfer phase of an interrupt-
acknowledge cycle, if the
VSBchip2 wins interrupt
arbitration. Default = 0E.
00
The value here is part of the
interrupt vector supplied on the
local bus during an interrupt
acknowledge cycle. The lower 4
bits are reserved (and are read-
only, as zeroes). Bits 4 through 7
are programmable. Default = 00.
00000000
Beginning address of an address
range for the first VSB to local
bus map decoder. Only the
upper 16 bits of this field are
significant (or used). Default =
00000000.
00000000
Ending address of an address
range for the first VSB to local
bus map decoder. Only the
upper 16 bits of this field are
significant (or used). Default =
00000000.
A
A-11
Advertisement
Table of Contents
