11
Some devices may also need to use a DMA (Direct Memory Access) channel. DMA
assignments for this mainboard are handled the same way as the IRQ assignment process
described above. You can select a DMA channel in the PCI and PnP configuration section of the
BIOS Setup utility.
2-9 External Connectors
1. Power Connector: ATX Power Connector (20-pin block): PL1
ATX Power Supply connector. This is a new defined 20-pins connector that usually comes
with ATX case. The ATX Power Supply allows to use soft power on momentary switch that
connect from the front panel switch to 2-pins Power On jumper pole on the mainboard.
When the power switch on the back of the ATX power supply turned on, the full power will
not come into the system board until the front panel switch is momentarily pressed. Press
this switch again will turn off the power to the system board.
P IN
R O W 2
R O W 1
1
3 .3 V
3 .3 V
2
-1 2 V
3 .3 V
3
G N D
G N D
4
S o ft Po w e r O n
5 V
5
G N D
G N D
6
G N D
5 V
7
G N D
G N D
8
-5 V
P o w e r O K
9
+ 5 V
+ 5 V SB (fo r S o ft L o g ic)
1 0
+ 5 V
+ 1 2 V
A T X P ow er C on n ector
P IN 1
2. PS/2 Mouse & PS/2 Keyboard Connector: MINI-DIN
The connectors for PS/2 keyboard and PS/2 Mouse.
3. USB Port connector: USB
The connectors are 4-pins connector that connect USB devices to the system board.
USB Port Connector
USB
4. Parallel Port Connector (25-pin female): PRINT
Parallel Port connector is a 25-pin D-Subminiature Receptacle connector. The On-board
Parallel Port can be disabled through the BIOS SETUP. Please refer to Chapter 3
“INTEGRATED PERIPHERALS SETUP” section for more detail information.
PS/2 Keyboard
PS/2 Mouse