Watch Dog Timer Setting
Software code SIO_IDX equ 4EH SIO_DTAequ 4FH
Timer equ 10; reset after 10 seconds
1.Enter configuration mode mov dx,SIO_IDX
mov al,87h out dx,al out dx,al
2.Set to LDN 08 mov dx,SIO_IDX mov al,07h out dx,al
mov dx,SIO_DTA mov al,08h
out dx,al
3.Set WatchDog Timer mov dx,SIO_IDX mov al,0f6h
out dx,al
mov dx,SIO_DTA mov al,Timer out dx,al
4.Exit configuration mode mov dx,SIO_IDX
mov al,0AAh out dx,al