MSI FUZZY CX700, User Manual

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4-3
System Reso urces
Software code
SIO_IDX equ 4EH
SIO_DTA equ 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 Pin118 to WDTO#
mov dx,SIO_IDX
mov al,2Bh
out dx,al
mov dx,SIO_DTA
in al,dx
and al,not 04h
out dx,al
3. Set to and active LDN 08
mov dx,SIO_IDX
mov al,07h
out dx,al
mov dx,SIO_DTA
mov al,08h
out dx,al
mov dx,SIO_IDX
mov al,30h
out dx,al
mov dx,SIO_DTA
in al,dx
or al,01h
out dx,al
4. Set WatchDog Timer
mov dx,SIO_IDX
mov al,0f4h
out dx,al
mov dx,SIO_DTA
mov al,Timer
out dx,al
5. Exit configuration mode
mov dx,SIO_IDX
mov al,0AAh
out dx,al
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