S y s t e m m o t h e r b o a r d
MS660 OWNER’S HANDBOOK 8/3
Clear BIOS settings, PL8
Moving the link to pins 2-3, from the default position 1-2,
disconnects the battery from the CMOS and will erase all the
system settings. This should only be used as a last resort in the event
of a password being totally lost and the link should be immediately
returned to its original position. All the BIOS settings will need to
be re-entered, see the chapter ‘System BIOS and setup’.
Clearing CMOS
PL8
CMOS battery connected (default)
1-2
CMOS erase, >1 second to discharge
2-3
BIOS re-program, PL10, PL11
These links are for an official upgrade to the motherboard BIOS.
They must not be moved for any other reason. Special software is
required and the task should be carried out by authorised engineers.
Recovery, PL10
Re-program, PL11
1-2, normal
1-2, enable
2-3, recovery
2-3, normal
Floppy disk control mode, PL22
Floppy disk mode, PL22
Link pins
Full 3-mode operation
1-3
3rd mode, 1.2 Mb operation available in Japan only
System Fan
Pins
CPU Fansink PL37
Pins
Main fan PL36
1
Ground
1
Ground
2
+12 volt supply
2
Controlled supply
3
Fan Fail
3
Ground
Soundblaster enable, PL100
Normal link 1-2, remove to disable sound.
