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1、1.源程序如下：DATASEGMENTADB5CH,85H;；两字节运算数BDB43H,0ABHDATAENDSCODESEGMENTASSUMECS:CODE,ds:DATASTART:MOVAX,DATAMOVDS,AXMOVSI,0;；置位移量初值MOVAL,A[SI];；取加数低位ADDAL,B[SI];,；两数相加MOVA[SI],AL;；存回A单元INCSI;；调整位移量MOVAL,A[SI];；取加数高位ADCAL,B[SI];；带进位加MOVA[SI],AL;；存回A单元MOVAH,4CHINT21HCODEENDSENDSTART；另外
2、两种方法的第（１）种方法DATASEGMENTADw855CH;；两字节运算数BDB0AB43HDATAENDSCODESEGMENTASSUMECS:CODE,ds:DATASTART:MOVAX,DATAMOVDS,AXMOVAx,AADDAx,BMOVA,axMOVAH,4CHINT21HCODEENDSENDSTART另外两种方法的第（２）种方法2、计算表达式（X+Y-10*Z)/*2的值的程序。DATASEGMENTXDd200YDd-100ZDW5aDW?bDW?DATAENDSSTACKSEGMENTSTACKDB200DUP(0)STAC
3、KENDSCODESEGMENTASSUMEDS:DATA,CS:CODE,SS:STACKSTART:MOVAX,DATAMOVDS,AX;DATA→AXMOVAX,wordptrXmovdx,wordptrx+2addax,wordptryadcdx,wordptry+2pushaxpushdxmovax,10imulzpopbxpopcxsubcx,axsbbbx,dxxchgax,cxxchgdx,bxmovbx,2idivbxmova,axmovb,bxMOVAH,4CHINT21HCODEENDS;退出DOS状态ENDSTART3、DATAS
4、EGMENTORG4000HADB?ORG4001HBDB?DATAENDSCODESEGMENTASSUMECS:CODE,DS:DATASTART:MOVAX,DATAMOVDS,AXMOVAL,00HMOVA,ALMOVBL,40HMOVB,BLMOVAH,4CHINT21HCODEENDSENDSTART
