Advantech PCA-6742 User Manual page 42

Dec dx
Mov al,0f5h
Out dx,al
Inc dx
In al,dx
And al,not 08h
Out dx,al
;-----------------------------------------------------------
Dec dx
Mov al,0f6h
Out dx,al
Inc dx
Mov al,10
Out dx,al
;-----------------------------------------------------------
Dec dx
Mov al,0aah
Out dx,al
2. Enable watchdog timer and set 5 minutes as timeout interval
;-----------------------------------------------------------
Mov dx,2eh
Mov al,87h
Out dx,al
Out dx,al
;-----------------------------------------------------------
Mov al,07h
Out dx,al
Inc dx
Mov al,08h
Out dx,al
;-----------------------------------------------------------
Dec dx
Mov al,30h
Out dx,al
Inc dx
Mov al,01h
Out dx,al
;-----------------------------------------------------------
Dec dx
Mov al,0f5h
Out dx,al
Inc dx
In al,dx
Or al,08h
Out dx,al
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; Set second as counting unit
; Set timeout interval as 10 seconds and start counting
; lock W83627HG
; unlock W83627HG
; Select registers of watchdog timer
; Enable the function of watchdog timer
; Set minute as counting unit
35 PCA-6742 User Manual