Lanner electronic FW-7650 - Manual (Page 51)

the WDT status register will set .
Watch Dog Timer Control Register (Index =71h, Default=00h)
Bit Description
7 WDT is reset upon a CIR interrupt
6 WDT is reset upon a KBC(mouse) interrupt
5 WDT is reset upon a KBC(keyboard) interrupt
4 WDT is reset upon a read or a write to the Game Port base address
3-2 Reserved
1 Force Time-out. This bit is self-clearing
0 WDT Status.
1:WDT value reaches 0
0: WDT value is not 0
Watch Dog Timer Configuration Register (Index=72h, Default=00h)
Bit Description
7 WDT Time-out value select
1: Second
0: Minute
6 WDT output through KRST (pulse) enable
5-4 Reserved
3-0 Select the interrupt level for WDT
Watch Dog Timer Time-Out Value Register (Index=73h, Default=00h)
Bit Description
7-0 WDT time-out value 7-0
If you enable the watch-dog, the hardware timer will reboot your system if your
software encounters an unexpected error, or stops responding. The watch-dog timer
period (from enable to reset) was decided by the jumper setting of watch-dog time out
period. Please refer to the chapter on jumper settings and connectors. During the period
of enable to reset, you could still cancel reset by disabling the watch-dog.
Notes : Lanner provide the sample code in the Manual/Driver CD. The path is under
//FW-7650_MB-X71/Watchdog