Motorola MVME166D2 Table A-1. ENV Command Parameters Continued, ENV Parameter and Options, A-11

Set Environment to Bug/Operating System

Table A-1. ENV Command Parameters (Continued)

ENV Parameter and Options	Default	Meaning of Default
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 μs.
Local Bus Time Out Code	00	This controls the local bus
		timeout. Default $00 = 8 μs.
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.

A

MVME166IG/D2 A-11