Asus Vintage - Manual (Page 47)

ASUS Vintage-S800 barebone system 47
3. Keyboard power (3-pin KBPWR1)
This jumper allows you to enable or disable the keyboard wake-up feature.
Set this jumper to pins 2-3 (+5VSB) if you wish to wake up the computer
when you press a key on the keyboard (the default is the Space Bar). This
feature requires an ATX power supply that can supply at least 1A on the
+5VSB lead, and a corresponding setting in the BIOS (see 5.5.5 “APM
Configuration”).
P4S800-MX Keyboard power setting
(Default)
+5V +5VSB
KBPWR1
2 3 1 2
AD1888
CODEC