程序汇编实验举例及总结.doc

5A版优质实用文档 PAGE PAGE 4 5A版优质实用文档 一、实验内容 1.在屏幕上显示一个字符的源程序： DATASSEGMENT STRINGDBHELLO!,$ ORG100H DATASENDS CODESSEGMENT ASSUMECS:CODES,DS:DATAS START: MOVAG,DATAS MOVDS,AG LEADG,STRING MOVAH,09H INT21H MOVAH,4CH INT21H CODESENDS ENDSTART 2.编写一个程序，实现字符串的复制功能,并且将复制的字符串显示出来 DATASSEGMENT STRING_ADBICHLIEBEDICH,$ COUNTEQU$-OFFSETSTRING_A DATASENDS STACKSSEGMENT STRING_BDBCOUNTDUP(?) STACKSENDS CODESSEGMENT ASSUMECS:CODES,DS:DATAS,SS:STACKS START: MOVAG,DATAS MOVDS,AG MOVAG,STACKS MOVES,AG LEASI,STRING_A LEADI,STRING_B MOVCG,COUNT STD REPMOVSB LEADG,STRING_B MOVAH,9 INT21H MOVAH,4CH INT21H MOVAH,4CH INT21H CODESENDS ENDSTART 3、利用中断调用，在屏幕上显示1—9之间随机数。中断号86H DATASSEGMENT CLADB13,10,WEAREGOINGTOPRODUCEANUMBERATRANDOM:$: INFONDB0DH,0AH,THEPROGRAMRUNSGOOD$ DATASENDS STACKSSEGMENTSTACK DB200DUP(0) STACKSENDS CODESSEGMENT ASSUMEDS:DATAS,SS:STACKS,CS:CODES START: MOVAG,DATAS MOVDS,AG LEADG,CLA MOVAH,9 INT21H MOVAG,0 MOVES,AG; MOVBG,86HG4 CLI MOVWORDPTRES:[BG],OFFSETRAN MOVWORDPTRES:[BG+2],SEGRAN STI INT86H MOVAH,02H INT21H LEADG,INFON MOVAH,9 INT21H MOVAG,4C00H INT21H RANPROC PUSHCG PUSHDG MOVAH,0 INT1AH MOVAG,DG GORDG,DG MOVBG,10 DIVBG ADDDL,30H MOVAH,02H INT21H POPDG POPCG IRET RANENDP CODESENDS ENDSTART 4.复制字符串，并倒序输出 DATASSEGMENT STRING_ADBstillhere,13,10,$ STRING_LDB$ DATASENDS STACKSSEGMENT STRING_BDB100DUP(?) STACKSENDS CODESSEGMENT ASSUMECS:CODES,DS:DATAS,SS:STACKS START: MOVAG,DATAS MOVDS,AG MOVAG,STACKS MOVSS,AG LEASI,STRING_L MOVAG,SI LEASI,STRING_A LEADI,STRING_B SUBAG,SI SUBAG,3 MOVCG,AG MOVBG,AG STD REPMOVSB LEADG,STRING_B MOVAH,9 INT21H MOVDL,13 MOVAH,2 INT21H MOVDL,10 MOVAH,2 INT21H LEASI,STRING_B MOVCG,BG ADDSI,BG DECSI S: MOVDL,[SI] MOVAH,2 INT21H DECSI LOOPS MOVAH,004CH INT21H CODESENDS ENDSTART 5、显示比较两个数的大小 DATASEGMENT ADB33H BDB87H DATAENDS STACKSEGMENT DW128DUP(?) STACKENDS CODESEGMENT ASSUMECS:CODE,DS:DATA,SS:STACK START:MOVAG,DATA MOVDS,AG MOVAL,A CMPB,AL JABGA MOVDL,A MOVBL,B JMPDISP BGA:MOVDL,B MOVBL,A DISP:MOVAH,2 INT21H MOVDL, INT21H MOVDL,BL INT21H MO