Motorola MVME177 manual Short I/O VMEbus A16 Control

D

Configure and Environment Commands

Table D-1. ENV Command Parameters (Continued)

ENV Parameter and Options	Default	Meaning of Default
Short I/O (VMEbus A16) Control	01	DeÞnes the access characteristics for the
		address space deÞned with the Short
		I/O address decoder. Default is $01.
F-Page (VMEbus A24) Enable	Y	Yes, Enable the F-Page Address
[Y/N]		Decoder.
F-Page (VMEbus A24) Control	02	DeÞnes the access characteristics for the
		address space deÞned with the F-Page
		address decoder. Default is $02.
ROM Speed Bank A Code	05	Used to set up the ROM speed. Default
ROM Speed Bank B Code	05	$05 = 165 ns (for 50 MHz MVME177s),
		or $05 = 132 ns (for 60 MHz
		MVME177s).
Static RAM Speed Code	01	Used to set up the SRAM speed.
		Default $01 = 125 ns (for 50 MHz
		MVME177s).
	00	Used to set up the SRAM speed.
		Default $00 = 132 ns (for 60 MHz
		MVME177s).
PCC2 chip Vector Base	05	Base interrupt vector for the component
VMEC2 Vector Base #1	06	speciÞed. Default: PCC2 chip = $05,
VMEC2 Vector Base #2	07	VMEchip2 Vector 1 = $06,
		VMEchip2 Vector 2 = $07.
VMEC2 GCSR Group Base Address	D4	SpeciÞes the group address
		($FFFFxx00) in Short I/O for this board.
		Default = $D4.
VMEC2 GCSR Board Base Address	00	SpeciÞes the base address ($FFFFD4x0)
		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 ∝s.
Local Bus Time Out Code	00	This controls the local bus timeout.
		Default $00 =8 ∝s.
VMEbus Access Time Out Code	02	This controls the local bus to VMEbus
		access timeout.
		Default $02 = 32 ms.

D-14