Main Logic Board Switch Settings - DEC Digital PC 3500 System Reference Manual

Technical Specifications

Main Logic Board Switch Settings

The switch settings located on the main logic board can be set to control many
features in your computer. Use the following tables and figure to locate the switch
settings on the main logic board and then modify the settings for desired results.
Feature Function
Clear password Clear
Normal
Recovery mode Recovery
Normal
Clear CMOS Clear
Normal
Factory setting Reserved
FLASH ROM Enable
write Disable
For mfg.
Manufacturing
Normal
switch
A-10
Setting
SW1-1, ON
(1) (1)
SW1-1, OFF
SW1-2, ON
(1) (1)
SW1-2, OFF
SW1-3, ON
(1) (1)
SW1-3, OFF
SW1-4, ON
(1)
SW1-4, OFF
SW1-5, ON
(1) (1)
SW1-5, OFF
SW1-6, ON
(1)
SW1-6, OFF
Description
If you forget your password, via BIOS Setup,
set this switch to ON and then restart the
computer.
If your flash BIOS upgrade failed and the BIOS
is corrupted, set this switch to ON so you can
boot your computer from a Crisis Recovery
diskette. Refer to the README.TXT provided
with the flash BIOS upgrade.
Clears CMOS of all BIOS setup information.
Use the Clear setting when your computer will
not boot, and BIOS setup cannot be accessed
due to configuration data corruption. This
switch must be set back to Normal before
rebooting your computer.
Reserved for future use.
When disabled, prevents reprogramming of
BIOS.
For use in manufacturing tests. Switch must
be set to OFF for PC normal functionality.