Motorola MVME166IG/D2 - Manual (Page 105)

Set Environment to Bug/Operating System
MVME166IG/D2 A-13
A
VSBC2 Requester Control 01000000 The bits in this register control
aspects of the local board’s
access of the VSB. Control and
status bits are available to
request control of the bus (and
determine when control has
been obtained), determine
whether the requester uses
"fairness" mode in arbitrating for
the bus, whether to release the
bus when done, and configure
the VSB requester arbitration ID
value. Definition of the register
contents can be found in the
MVME166 programmer’s
reference guide. Default =
01000000.
VSBC2 Timer Control Register 1000 The bits in this register control
various timers and their timeout
periods, for VSB accesses.
Definition of the register
contents can be found in the
MVME166 programmer’s
reference guide. Default = 1000.
VSBC2 Master Starting Address #1 00000000 Beginning address of an address
range for the local bus to VSB
map decoder #1. Only the upper
16 bits of this field are significant
(or used). Default = 00000000.
VSBC2 Master Ending Address #1 00000000 Ending address of an address
range for the local bus to VSB
map decoder #1. Only the upper
16 bits of this field are significant
(or used). Default = 00000000.
VSBC2 Master Address Offset #1 00000000 Address offset for the local bus
to VSB map decoder #1. The
upper 16 bits of this field will be
added to the upper 16 bits of the
local bus address received. This
sum is then the address driven
onto the VSB address lines.
Default = 00000000.
Table A-1. ENV Command Parameters (Continued)
ENV Parameter and Options Default Meaning of Default