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MS-9821 Mainboard
4-2
Watch Dog Timer Setting
Software code
SIO_IDX equ 2EH
SIO_DTA equ 2FH
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