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stt segment stackdb 64 dup (0)stt endsdata segmentdata endscode segmentassume cs:code,ds:data,ss:sttstart:mov ax,datamov ds,axmov al,89h ；控制字的写入,A口输出，C口输入，B口输出out 63h,almov al,0ffhout 62h,ala1: mov al,30h ；管脚清零out 60h,almov al,6fhout 61h,ala2: in al,62h ；开始test al,08h jnz a2call delay1... |
