Advantech IPPC-8151S Series Manual do Utilizador descarregar pdf (Página 42)

IPPC-8151S User Manual 34

;----------------------------

; select WDT configuration

;----------------------------

mov dx, bx

add dx, 67h

in al, dx

or al, 04h ; reset upon mouse interrupt

out dx, al

4. Enable watchdog timer to be reset upon keyboard interrupt

(Note: WDT timeout value must be set before this function can work)

;----------------------------

; enter configuration state

;----------------------------

mov dx, 2Eh

mov al, 55h

out dx, al

;----------------------------

; select watchdog registers

;----------------------------

mov al, 7

mov dx, 2Eh

out dx, al

mov dx, 2Fh

mov al, 0ah

out dx, al

;----------------------------

; get base address

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Advantech IPPC-8151S Series Manual do Utilizador Página 42