3. Configuration
33
CAUTION:
Do not close SW2-1 and SW2-2 at the same time. Doing so will significantly
shorten battery life.
SW2-1
SW2-2
CMOS Configuration RAM
Closed
Open
Default
Normal operation - battery backed.
Open
Closed
Clear CMOS (return to default after clearing).
SW2-3 (VGA Routing Control)
This switch controls the routing of VGA signals to either the front or rear of the board. The
default switch configuration routes VGA signals to the faceplate video connector.
SW2-3
Function
Open
Default
VGA routed to the J6 video connector on the faceplate.
Closed
VGA routed to the J5 Rear Panel I/O connector.
SW3-1 (BIOS Recovery Module/Flash Select)
Use this switch to boot from the BIOS Recovery Socket (U38). When SW3-1 is open, the BIOS
boots from the on-board flash memory. When SW3-1 is closed, the BIOS boots from the BIOS
Recovery Socket. Factory default is open. See the "
BIOS Recovery Module
" topic in Chapter 8
for details on how to flash the BIOS.
SW3-1
Function
Open
Default
Boots from on-board flash memory.
Closed
Boots from the BIOS recovery socket.
SW3-2 (Flash Write-Protect)
Closing this switch write-protects flash memory. Open SW3-2 when installing an operating
system image (such as VxWorks) into flash or when using the
FLASH.EXE
utility to recover
from a corrupted BIOS. The status of this switch can be read back at the
Switch Monitor
register
(Port E3h, bit 7). Factory default is open.
SW3-2
Function
Open
Default
Flash disk/BIOS read/write.
Closed
Flash disk/BIOS read only.
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