Motorola MVME166IG/D2, MVME166D2 manual VSBC2 Requester Control

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)

ENV Parameter and Options	Default	Meaning of Default
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.

A

MVME166IG/D2 A-13