User manual

95 PCE-5125 User Manual
Appendix C Programming the GPIO
MOV DX,4FH
MOV AL,00H ; 01:Input 00:output for GP10~GP17
OUT DX,AL
MOV DX,4EH
MOV AL,F2H ;
OUT DX,AL
MOV DX,4FH
MOV AL,00H ;Set GPIO is normal not inverter
OUT DX,AL;
MOV DX,4EH
MOV AL,F1H
OUT DX,AL
MOV DX,4FH
MOV AL,??H ; Put the output value into AL
OUT DX,AL
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Exit extended function mode |
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MOV DX,4EH
MOV AL,AAH
OUT DX,AL