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Mainboard User's Manual
LAUDIO: Mic/Speaker Out header
Pin
Signal Name
1
Active LINE Out (R)
3
GND (aLO)
5
GND (+12)
7
+12V (1A)
9
MIC
11
Front LINE Out(R)
13
Front LINE Out (L)
15
GND (tLO)
AUDIO: Front panel MIC/Speaker Out header
This header allows the user to install auxiliary front-oriented
microphone and line-out ports for easier access.
Pin
Signal Name
1
MICIN
3
MICBIAS
5
SPKOUTR
7
Empty
9
SPKOUTL
JP4: External SMI connector
The SMI (System Management Interrupt) is a hardware interrupt in
Intel SL Enhanced 486 and Pentium CPUs used for power
management. This interrupt is also used for virus checking.
Pin
Signal Name
1
EXTSMI
2
GND
18
Pin
Signal Name
2
Active LINE Out (L)
4
GND (aLO)
6
GND (+12)
8
(Cut away)
10
GND (MIC)
12
LINE Next (R)
14
LINE Next (L)
16
No pin
Pin
Signal Name
2
AGND
4
5V
6
XSPKOUTR
8
KEY
10
XSPKOUTL
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