Motorola MVME166IG/D2 - Manual (Page 103)

Set Environment to Bug/Operating System
MVME166IG/D2 A-11
A
VMEC2 GCSR Group Base Address CC Specifies the group address
($FFFFXX00) in Short I/O for
this board. Default = $CC.
VMEC2 GCSR Board Base Address 00 Specifies the base address
($FFFFCCXX) in Short I/O for
this board. Default = $00.
VMEbus Global Time Out Code 01 This controls the VMEbus
timeout when systems
controller. Default $01 = 64
µ s.
Local Bus Time Out Code 00 This controls the local bus
timeout. Default $00 = 8
µ s.
VMEbus Access Time Out Code 02 This controls the local bus to
VMEbus access timeout. Default
$02 = 32 ms.
The special 166Bug parameters that can be configured using ENV are as follows.
VSBC2 Installed [Y/N] Y This is set depending on the
existence of a VSBchip2 on the
board. It can be overridden with
this ENV option.
VSBC2 Interrupt Vector Base 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.
VSBC2 Local Interrupt Vector Base 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.
VSBC2 Slave Starting Address #1 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.
VSBC2 Slave Ending Address #1 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.
Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options Default Meaning of Default