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55 Appendix A
A.1.2 GPIO Example program-1
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Enter the extended function mode, interruptible double-write
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MOV DX,2EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
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Configure logical device 7(GP10~GP17), configuration register
CRF0,CRF1,CRF2
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MOV DX,2EH
MOV AL,07H ; point to Logical Device Number Reg.
OUT DX,AL
MOV DX,2FH
MOV AL,07H ; select logical device 7
OUT DX,AL ;
MOV DX,2EH
MOV AL,F0
OUT DX,AL
MOV DX,2FH
MOV AL,00H ; 01:Input 00:output for GP10~GP17
OUT DX,AL
MOV DX,2EH
MOV AL,F2H ;
OUT DX,AL
MOV DX,2FH
MOV AL,00H ;Set GPIO is normal not inverter
OUT DX,AL;
MOV DX,2EH
MOV AL,F1H