Motherboard Description
SY-P4VSA
16
1-10.4 PS/2 Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel of the
motherboard. The +5 V lines to keyboard and mouse connectors are
protected with a fuse that prevents motherboard components from being
damaged when an over-current condition occurs.
Note
The mouse and keyboard can be plugged into either PS/2 connector. Power
to the computer should be turned off before a keyboard or mouse is
connected or disconnected.
The keyboard controller contains code, which provides the traditional
keyboard and mouse control functions, and also supports Power On/Reset
password protection. Power On/Reset password can be specified in the
BIOS Setup program.
The keyboard controller also supports the hot-key sequence
<Ctrl><Alt><Del>, software reset. This key sequence resets the computer’s
software by jumping to the beginning of the BIOS code and running the
Power On Self Test (POST).
1-10.5 Infrared Support
On the front panel I/O connector, there are six pins that support Hewlett
Packard HSDL-1000 compatible infrared (IR) transmitters and receivers. In
the Setup program, Serial Port B can be direct4d to a connected IR device.
(In this case, the Serial Port B connector on the back panel cannot be used.)
The IR connection can be used to transfer files to or from portable devices
like laptops, PDAs, and printers. The Infrared Data Association (IrDA)
specification supports data transfers of 115Kbits/sec at a distance of 1 meter.
1-11 HARDWARE MONITOR
The optional hardware monitor subsystem provides low-cost
instrumentation capabilities. The features of the hardware monitor
subsystem include:
An integrated ambient temperature sensor
