Advantech AIMB-221 manual

Mov	al,01h
Out	dx,al
;-----------------------------------------------------------
Dec dx		; Generate a time-out signal
Mov	al,0f7h
Out	dx,al	;Write 1 to bit 5 of F7 register
Inc	dx
In	al,dx
Or al,20h
Out	dx,al
;-----------------------------------------------------------
Dec dx		; lock W83627HF
Mov	al,0aah
Out	dx,al

AIMB-221 User Manual 96