DFI EL620-C - Page 114

114
A
Watchdog Timer
MOV DX,SIO_DATA ;BIT1 DIS/EN WDTO# OUTPUT LOW PULSE TO
KBRST#PIN(0=DIS, 1=ENABLE)
IN AL,DX ;BIT3 COUNTER MODE SLEECT (0=SECOND
MODE, 1=MINUTE MODE)
OR AL,02H
OUT DX,AL
MOV DX,SIO_CON_PORT
MOV AL,0F6H ;WATCH DOG COUNTER
OUT DX,AL
MOV DX,SIO_DATA
MOV AL,0AH ;SET COUNTER (EX 10 SEC)
OUT DX,AL
MOV DX,SIO_CON_PORT
MOV AL,0F7H ;WATCH DOG COUNTER
OUT DX,AL
MOV DX,SIO_DATA
MOV AL,00H ;Clear WDTO
OUT DX,AL
mov DX,SIO_CON_PORT ;SUPERIO EXIT CONFIG
mov al, 0AAh
out dx, al
;================ RETURN DOS ===================
mov ah,4ch ;return dos
int 21h
end begin