Chapter 2 – Installation
2-3
B
B
50 MHz (75)
A
B
60 MHz (90/120/150)
B
A
66 MHz
(100/133/166/200/
200 MMX/233 MMX)
A
A
Undefined
Lattice Programming Port (J5)
This jumper is reserved for Xycom use.
ORB_GND Selection
J8
ORB_GND Connected to Digital GND
A
No
B
Yes
VGA Enable
J1
VGA Enable
A
Enable
B
Disable
Switch Settings
The XVME-655 has one eight-position switch, as described in Table Chapter 2 -2. (
Ö
indicates the default setting.)
Table Chapter 2 -2. Switch Settings
Position
Open
Closed
1
VME resets only VME interface
Ö
VME reset causes CPU and VME interface reset
2
Front panel toggle switch
causes no VMEbus reset
Ö
Front panel toggle switch causes VMEbus reset
3
Ö
Sysfail asserted on VME
reset
Sysfail not asserted on VME reset
4
Ö
CMOS okay
CMOS cleared by BIOS
5
Front panel toggle switch
causes no CPU reset
Ö
Front panel toggle switch causes CPU reset
6
Ö
Upper Flash BIOS
Lower Flash BIOS
7
Ö
Keyboard as input
Keyboard inhibit
8
Ö
Color
Monochrome
Registers
The XVME-655 contains two I/O ports: 219h and 218h.
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