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1、实验2—1（1）定义字DATASEGMENTADW855CHBDW0AB43HNUMDW?DATAENDSCODESEGMENTAssumeCS:CODE,DS:DATASTART:MOVAX,DATAMOVDS,AXMOVAX,AMOVBX,BADDAX,BXMOVNUM,AXMOVAH,4CHINT21HCODEENDSENDSTART实验2—1直接寻址DATASEGMENTADB5CH,85HBDB43H,0ABHNUMDW?DATAENDSCODESEGMENTAssumeCS:CODE,DS:DATASTART:MOVAX,DATAMOVD
2、S,AXMOVAX,AMOVBX,BADDAX,BXMOVNUM,AXMOVAH,4CHINT21HCODEENDSENDSTART实验2—3拆字DATASEGMENTORG1000HNUMDW1234HORG4000HADB？BDB?DATAENDSCODESEGMENTAssumeCS:CODE,DS:DATASTART:MOVAX,NUMMOVA,AHMOVB,ALMOVAH,4CHINT21HCODEENDSENDSTART实验3—3DATASEGMENTINFOR1DB0AH,0DH,'PleasePressanykeytoinputale
3、tter:$';0AH为换行，0DH为回车INFOR2DB0AH,0DH,'YouInputalowercaseletter!$'INFOR3DB0AH,0DH,'Youinputauppercaseletter!$'INFOR4DB0AH,0DH,'Youinputadigit!$'INFOR5DB0ah,0dh,'Youinputotherletter!$'DATAENDSCODESEGMENTASSUMECS:CODE,DS:DATASTART:MOVAX,DATAMOVDS,AXMOVDX,OFFSETINFOR1MOVAH,09H;输出字符
4、串INFOR1;MOVAH,1INT21HMOVAH,01H;从键盘输入一个字符INT21HCMPAL,'0'JBOTHER;小于0，为其他字符CMPAL,'9'JBEDIGIT;大于等于0，小于等于9，为数字CMPAL,'A'JBOTHERCMPAL,'Z'JBEUPPERCMPAL,'a'JBOTHERCMPAL,'z'JBELOWERJMPPENDLOWER:MOVDX,OFFSETINFOR2MOVAH,09HINT21HJMPPENDUPPER:MOVDX,OFFSETINFOR3MOVAH,09HINT21HJMPPENDDIGIT:MO
5、VDX,OFFSETINFOR4MOVAH,09HINT21HJMPPENDOTHER:MOVDX,OFFSETINFOR5MOVAH,09HINT21HJMPPENDPEND:MOVAH,4CHINT21HCODEENDSENDSTART实验3—1DATASEGMENTSTRINGDB'Iamastudent'LENEQU$-STRINGDATAENDSCODESEGMENTAssumeCS:CODE,DS:DATASTART:MOVAX,DATAMOVDS,AXMOVBX,OFFSETSTRINGMOVCL,LENNEXT:MOVAL,[BX]C
6、MPAL,'a'JBLOPCMPAL,'z'JALOPSUBAL,20HMOV[BX],ALLOP:INCBXDECCLJNZNEXTMOVAH,4CHINT21HCODEENDSENDSTART实验4—1DATASEGMENTADB''NEQU$-ABDBNDUP(?)DATAENDSCODESEGMENTASSUMECS:CODE,DS:DATASTART:MOVAX,DATAMOVDS,AXMOVES,AXLEASI,ALEADI,BADDDI,NMOVCX,NMOVE:MOVAL,[SI]MOVES:[DI],ALINCSIDECDILOOP
7、MOVEMOVAH,4CHINT21HCODEENDSENDSTART实验4—2DATASEGMENTORG1000HDB100DUP('A')ORG1050HDB100DUP('B')DATAENDSCODESEGMENTASSUMECS:CODE,DS:DATA,ES:DATASTART:MOVAX,DATAMOVDS,AX;MOVES,AXMOVSI,1000HMOVDI,1050HMOVCX,100AGAIN:MOVAL,[SI]MOV[DI],ALINCSIINCDILOOPAGAINMOVAH,4CHINT21HCODEENDSENDST
8、ART实验4—3DATASEGMENTBUFDW1,2,3,4,5,6,7,8,9,0MAXDW0DATAE
