2 AIMB-742 Startup Manual
The board has a number of jumpers that allow you to
configure your system to suit your application.
The table below lists the function of each of the jump-
ers and connectors.
The CD disc contains a driver installer program that will
lead you through the installation of various device driv-
ers needed to take full advantage of your motherboard.
The computer is provided with a battery-powered
Real-time Clock circuit. There is a danger of explo-
sion if battery is incorrectly replaced. Replace only
with same or equivalent type recommended by the
manufacturer. Discard used batteries according to
manufacturer's instructions
Jumpers and Connectors
Label
Function
J1
CMOS clear
J2
Watchdog timer output selection
Label
Function
CN1
Primary IDE connector
CN2
Secondary IDE connector
CN3
Floppy drive connector
CN4
Parallel port
CN6
USB port 4, 5
CN7
VGA connector
CN9
Serial port: COM1
CN10
Serial port: COM2
CN11
PS/2 keyboard and mouse connector
CN12
External keyboard connector
CN14
CPU FAN connector
CN15
System FAN connector 1
CN16
Power LED and Keyboard Lock
CN17
External speaker
CN18
Reset connector
CN19
HDD LED connector
CN21
ATX soft power switch (PS_ON)
CN22
HW Monitor Alarm
Close: Enable OBS Alarm
Open: Disable OBS Alarm
CN29
SM BUS Connector
PIN1: SMB_DATA
PIN2: SMB_CLOCK
CN31
USB port 0, 1 & LAN1
CN32
USB port 2, 3 & LAN2
CN37
System FAN connector 2
CN44
CF socket (Optional), Master mode only
CN55
Line Out, MIC IN connector
CN56
CD IN (Audio input from CD-ROM)
CN57
AUX IN connector
CN58
MDM IN connector
CN59
FP AUDIO connector
CN62
8-pin Alarm Board Connector
CN63
USB port 6, 7
CN64
Case Open
SA0
SerialATA 0
SA1
SerialATA 1
ATX1
ATX 12V Auxiliary power conn
ATX2
ATX power connector
J1: CMOS clear function
Pins
Result
1-2 (closed) Keep CMOS data*
2-3 (closed) Clear CMOS data
J2: Watchdog timer output option
Closed pins
Result
1-2
IRQ11
2-3
System reset *
Software Installation
Caution
*default setting
