User manual

IPPC-8151S User Manual 32
;----------------------------
; select WDT timeout unit
;----------------------------
mov dx, bx
add dx, 65h
mov al, 00h ; minute
out dx, al
;----------------------------
; select WDT timeout value
;----------------------------
mov dx, bx
add dx, 66h
mov al, 5 ; 5 minutes
out dx, al
3. Enable watchdog timer to be reset upon mouse 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