Advantech AIMB-340F series User Manual page 103

OUT DX,AL
MOV DX,2FH
MOV AL,00H ;Set GPIO is normal not inverter
OUT DX,AL
;
MOV DX,2EH
MOV AL,F1H
OUT DX,AL
MOV DX,2FH
MOV AL,??H ; Put the output value into AL
OUT DX,AL
;------------------------------------------
; Exit extended function mode |
;------------------------------------------
MOV DX,2EH
MOV AL,AAH
OUT DX,AL
89 Appendix B