22
2.3.14.3 RESET header (RST)
The 2-pin reset header is located on pins 9--10 (marked as RST) of the front panel
connector. It can be connected to a momentary type switch that is normally open. When the
switch is close, the system will reset.
Signal of RST header
Pin 9 -------- Ground
Pin 10 -------- RESET
2.3.14.4 Power LED and KEYLOCK header (PLED and KL)
The power LED and keylock header is located on pins 11--15 (marked as PLED and KL) of
the front panel. It contains two functions: the power on LED header and the keylock header.
The power on LED can be connected to a LED. When the computer is powered on, the LED
will be lighted up. The keylock header can be connected to a switch on the chassis. When
the switch is close, keyboard function will be disabled temporarily until the switch is open.
Signal of PLED header
Signal of KL header
Pin 11 ---------- Anode (+)
Pin 14 ---------- KEYLOCK
Pin 12 ---------- NC
Pin 15 ---------- Ground
Pin 13 ---------- Cathode (-)
2.3.14.5 SPEAKER header (SPKR)
The 4-pin speaker header is located on pins 17--20 (marked as SPKR) of the front panel
connector. The speaker provides error beep code information during the POST in the event
that the computer can not use the video interface.
Signal of SPKR header
Pin 17
VCC
Pin 18
Ground
Pin 19
NC
Pin 20
BUZZ
2.3.14.6 Connect the ACPI LED
The 2-pin ACPI LED is located on pins 1-2 (marked as ACPI) of the front panel connector.
Connect the chassis‘s ACPI LED to this header.
Signal of ACPI LED header
Pin 1
Anode (+)
Pin 2
Cathode (-)
2.3.15 SB-LINK header (SB-LINK)
Sound Blaster 16 was almost the standard of the ISA Bus sound cards, a lot of games were
programmed for Sound Blaster especially under DOS environment. If the users are still interested
in playing these game titles, they might have compatibility problems with the new up graded PCI
Bus sound card.