Portwell WADE-8075, User Manual

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System Installation
WADE-8075 / WADE-8076 User’s Manual 3-3
3.3.4 Audio Controller
Please find Realtek ALC888 (High Definition Audio driver) form WADE-8075
CD-title. The drivers support Windows XP/Vista/Win7.
3.4 Clear CMOS Operation
The following table indicates how to enable/disable Clear CMOS Function hardware
circuit by putting jumpers at proper position.
JP4: CMOS Clear
JP4 Function
1-2 Short
Normal Operation
Ì
2-3 Short Clear CMOS Contents
3.5 WDT Function
The Watchdog Timer of motherboard consists of 8-bit programmable time-out
counter and a control and status register.
WDT Controller Register
There are two PNP I/O port addresses that can be used to configure WDT.
2Eh: EFIR (Extended Function Index Register, for identifying CR index number)
2Fh: EFDR (Extended Function Data Register, for accessing desired CR)
WDT Control Mode Register
The working algorithm of the WDT function can be simply described as a counting
process. The Time-Out Interval can be set through software programming. The
availability of the time-out interval settings by software or hardware varies from
boards to boards.
WADE-8075 allows users to control WDT through dynamic software programming.
The WDT starts counting when it is activated. It sends out a signal to system reset or
to non-maskable interrupt (NMI), when time-out interval ends. To prevent the
time-out interval from running out, a re-trigger signal will need to be sent before the
counting reaches its end. This action will restart the counting process. A well-written
WDT program should keep the counting process running under normal condition.
WDT should never generate a system reset or NMI signal unless the system runs into
troubles.