Advantech TPC-1770, User Manual

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33 Chapter A
mov dx, 2Eh
out
dx, al
mov dx, 2Fh
in
al, dx
; now, AX contains the base address
mov bx, ax ; save base address in BX
;----------------------------
; exit configuration state
;----------------------------
mov dx, 2Eh
mov al, 0AAh
out
dx, al
;----------------------------
; select WDT pin
;----------------------------
mov dx, bx
add
dx, 47h
mov al, 0Ch
out
dx, al
;----------------------------
; select WDT timeout unit
;----------------------------
mov dx, bx
add
dx, 65h
mov al, 80h ; second
out dx, al