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D
Watchdog Sample Code
Appendix D - Watchdog Sample Code
;Software programming example:
;----------------------------------------------------------------
;(1)Enter Superio Configuration mode
;----------------------------------------------------------------
MOV
DX,2Eh
MOV
AL,87h
OUT
DX,AL
MOV
AL,01h
OUT
DX,AL
MOV
AL,55h
OUT
DX,AL
MOV
AL,55h
OUT
DX,AL
;--------------------------------------------------------------------------
;(2) Configuration Logical Device 7,register CR72 & CR73
;
(Watch Dog Timer enable & Time-Out Value Register)
;--------------------------------------------------------------------------
MOV
DX,2Eh
MOV
AL,07h
;Ready to Program Logical Device
OUT
DX,AL
MOV
DX,2Fh
MOV
AL,07h
;Select Logical Device 7
OUT
DX,AL
MOV
DX,2Eh
MOV
AL,72h
;Select CR72
OUT
DX,AL
MOV
DX,2Fh
IN
AL,DX
OR
AL,40h
;Set CR72[Bit:6]=1, WDT output through KRST
enable
OUT
DX,AL
