Acnodes FES 8730 - Manual (Page 70)

Assembly sample Code:
Set functionality:
;Start set LED Output program:
mov dx,2Eh ;Un-lock super I/O
mov al,87h
out dx,al
out dx,al
mov dx,2Eh ;Switch to LED logic device
mov al,07h
out dx,al
mov dx,2Fh
mov al,07h
out dx,al
; Set LED output pins value.
mov dx,2Eh
mov al,0EDh
out dx,al
mov dx,2Fh
in al,dx
or al,Yh ;set output value Y
out dx,al ;bit4~5 are onboard LED Output pin
;4~5 state (1 High, 0 Low)
;(see below
Note1 )