/7CCSCAN:MOVAL,00HMOVDX,MY8255_AOUTDX,ALMOVDX,MY8255_CINAL,DXNOTALANDAL,0FHRET5.Play輸出發(fā)音的子程序PLAYPROCMOVAH,0MOVSI,AXSHLSI,1MOVDX,0FHMOVAX,4240HDIVWORDPTR[SI]MOVDX,MY8254_COUNT0OUTDX,ALMOVAL,AHOUTDX,ALRETPLAYENDP6.延時子程序DALLYPROCD0:MOVCX,0010HD1:MOVAX,02HD2:DECAXJNZD2LOOPD1DECDLJNZD0RETDALLYENDP7.按鍵掃描功能COLUM:MOVAL,CHMOVDX,MY8255_AOUTDX,ALMOVDX,MY8255_CINAL,DXL1:TESTAL,01HJNZL2MOVAL,00HJMPKCODEL2:TESTAL,02HJNZL3MOVAL,04HJMPKCODEL3:TESTAL,04HJNZL4MOVAL,08HJMPKCODEL4:TESTAL,08HJNZNEXTMOVAL,0CHKCODE:ADDAL,CLCALLPLAYPUSHAXKON:CALLDALLYCALLCCSCANJNZKONPOPAXJMPBEGIN1六．源程序清單I0Y0EQU06C0HMY8254_COUNT0EQUI0Y0+00HMY8254_COUNT1EQUI0Y0+02HMY8254_COUNT2EQUI0Y0+04HMY8254_MODEEQUI0Y0+06HMY8255_AEQU0640HMY8255_BEQU0642HMY8255_CEQU0644HMY8255_MODEEQU0646HSTACK1SEGMENTSTACKDW256DUP(?)STACK1ENDSDATASEGMENTFREQ_LISTDW262H,294H,330H,349H,392H,440H,496HDW523H,587H,659H,698H,784H,880H,988HDTABLEDB3FH,06H,5BH,4FH,66H,6DH,7DH,07HDB7FH,6FH,77H,7CH,39H,5EH,79H,71HDATAENDSCODESEGMENTASSUMECS:CODE,DS:DATASTART:MOVAX,DATAMOVDS,AXMOVDX,MY8255_MODEMOVAL,81HOUTDX,ALMOVDX,MY8254_MODEMOVAL,36HOUTDX,ALBEGIN1:CALLCCSCANJNZINK1JMPBEGIN1INK1:CALLCCSCANJNZINK2JMPBEGIN1INK2:MOVCH,0FEHMOVCL,00HCOLUM:MOVAL,CHMOVDX,MY8255_AOUTDX,ALMOVDX,MY8255_CINAL,DXL1:TESTAL,01HJNZL2MOVAL,00HJMPKCODEL2:TESTAL,02HJNZL3MOVAL,04HJMPKCODEL3:TESTAL,04HJNZL4MOVAL,08HJMPKCODEL4:TESTAL,08HJNZNEXTMOVAL,0CHKCODE:ADDAL,CLCALLPLAYPUSHAXKON:CALLDALLYCALLCCSCANJNZKONPOPAXJMPBEGIN1NEXT:INCCLMOVAL,CHTESTAL,08HJZKERRROLAL,1MOVCH,ALJMPCOLUMKERR:JMPBEGIN1CCSCAN:MOVAL,00HMOVDX,MY8255_AOUTDX,ALMOVDX,MY8255_CINAL,DXNOTALANDAL,0FHRETPLAYPROCMOVAH,0MOVSI,AXSHLSI,1MOVDX,0FHMOVAX,4240HDIVWORDPTR[SI]MOVDX,MY8254_COUNT0OUTDX,ALMOVAL,AHOUTDX,ALRETPLAYENDPDAL