DFI CA331-NR - Manual (Page 125)

125
A
Watchdog Timer
MOV DX,4FH
MOV AL,02H ;Set CRF7[Bit:7,6]=11, WDT reset by mouse/keyboard
interrupt
OUT DX,AL
;-------------------------------------------
;(3) Exit extended function mode
;-------------------------------------------
MOV
DX,4EH
MOV AL,AAH
OUT DX,AL