User manual

37 Chapter A
shl al, 8
mov al, 61h
mov dx, 2Eh
out dx, al
mov dx, 2Fh
in al, dx
; now, AX contains the base address
mov bx, ax ; save base address in BX
;----------------------------
; exit configuration state
;----------------------------
mov dx, 2Eh
mov al, 0AAh
out dx, al
;----------------------------
; Force timeout
;----------------------------
mov dx, bx
add dx, 68h
in al, dx
or al, 04h ; force timeout
out dx, al