Soyo SY-K7ADA User Manual

Motherboard Description

SY-K7ADA

Legacy-Free and Legacy Reduction specification of PC2001.

1-7.1 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).

1-8 HARDWARE MONITOR

The hardware monitor subsystem provides instrumentation capabilities.

The features of the hardware monitor subsystem include:
n 2 thermistor input for remote temperature sensing (CPU/System)
n Monitor 4 positive voltages (Vcore/+3.3V/+5V/+12V)
n Monitor 2 fan speeds
n 2 PWM outputs for fan speed control
n Power-on beep warning when CPU core voltage is out of range
n VID4-VID0 monitoring inputs
n Windows 95/98 utility included