www.dfi .com
73
Appendix A Watchdog Sample Code
Appendix A
Appendix A - Watchdog Sample Code
;Software programming example:
;---------------------------------------------
;(1) Enter Super IO Confi guration mode
;---------------------------------------------
MOV DX,4EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
;-------------------------------------------------------------------------------------------
;(2) Confi guration Logical Device 8, register CRF0/CRF1 (WDT Control/WDT
timer)
;-------------------------------------------------------------------------------------------
MOV DX,4EH
MOV
AL,07H
;Ready to Program Logical Device
OUT DX,AL
MOV DX,4FH
MOV
AL,08H
;Select Logical Device 8
OUT DX,AL
MOV DX,4EH
MOV
AL, F1H
;Select watchdog timer register
OUT DX,AL
MOV DX,4FH
MOV
AL,10H
;Set watchdog timer value
OUT DX,AL
MOV DX,4EH
MOV
AL, F0H
;Select watchdog Control Register
OUT DX,AL
MOV DX,4FH
MOV
AL,02H
;Set Watchdog Control Value
OUT DX,AL
;----------------------------------------------------------------
;(1) Exit extended function mode
;----------------------------------------------------------------
MOV DX,4EH
MOV AL,AAH
OUT DX,AL
