华南农业大学8086汇编实验答案资料.docx
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华南农业大学8086汇编实验答案资料
华南农业大学8086汇编实验答案
1-1
DATASSEGMENT
STRINGDB"BASEDADDRESSING",13,10,'$'
LENEQU$-STRING
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
LEADX,STRING
MOVAH,9
INT21H
LEASI,STRING
ADDSI,LEN
SUBSI,03H
MOVCX,LEN
SUBCX,02H
LOP1:
MOVAH,02H
MOVDL,[SI]
INT21H
DECSI
LOOPLOP1
MOVAH,4CH
INT21H
CODESENDS
ENDSTART
1-2
DATASSEGMENT
XDB"X=$"
YDB13,10,"Y=$"
ZDB13,10,"X+Y=$"
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
MOVAH,9;输出“X=”
LEADX,X
INT21H
MOVAH,1;输入并回显X，X放在CL
INT21H
SUBAL,30H
MOVCL,AL
MOVAH,9;输出“Y=”
LEADX,Y
INT21H
MOVAH,1;输入并回显Y，Y放在DL，X+Y的值放在CL
INT21H
SUBAL,30H
ADDCL,AL
MOVAH,9;输出“X+Y=”
LEADX,Z
INT21H
MOVAH,2;输出X+Y的值
MOVDL,CL
ADDDL,30H
INT21H
MOVAH,4CH
INT21H
CODESENDS
ENDSTART
1-3
DATASSEGMENT
ARRAYDB64DUP（25H,43H,41H,78h）
UPDW0
DOWNDW0
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
LEASI,ARRAY
MOVCX,100H
C0:
MOVAL,[SI]
CMPAL,42H
JBC1
JNBC2
C1:
INCDOWN
JMPC3
C2:
INCUP
JMPC3
C3:
INCSI
LOOPC0
MOVAH,4CH
INT21H
CODESENDS
ENDSTART
2-1
DATASSEGMENT
CAPITALDB13,10,'$'
SDB13,10,"Pleaseenteralowercaseletter:
",'$'
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
MOVCX,5
L:
MOVAH,1
INT21H
MOVBL,AL
CMPBL,61H
JBEXCEPTION
CMPBL,7AH
JNBEXCEPTION
PUSHAX
LEADX,CAPITAL
MOVAH,9
INT21H
POPDX
SUBDL,20H
MOVAH,2
INT21H
JMPFINAL
EXCEPTION:
LEASI,S
MOVDX,SI
MOVAH,9
INT21H
LOOPL
FINAL:
MOVAH,4CH
INT21H
CODESENDS
ENDSTART
2-2
DATASSEGMENT
STRINGDB"zabcdefghijklmnopqrstuvwxyza"
SPACEDB13,10,'$'
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
MOVAH,1;输入并回显测试的一个小写字母
INT21H
LEADX,SPACE
MOVAH,9
INT21H
LEASI,STRING;在字符串string中查找输入的字母
L:
INCSI
CMPAL,[SI]
JNZL
DECSI;显示前导字母、输入字母和后续字母
MOVCX,3
L1:
MOVDL,[SI]
MOVAH,2
INT21H
INCSI
LOOPL1
MOVAH,4CH
INT21H
CODESENDS
ENDSTART
2-3
DATASSEGMENT
STRING1DB"ASTRING"
COUNT1DW$-STRING1
STRING2DB"STRING"
COUNT2DW$-STRING2
ANSWER1DB'MATCH','$'
ANSWER2DB'NOMATCH','$'
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
MOVAX,COUNT1;比较字符串长度是否相同
MOVBX,COUNT2
CMPAX,BX
JNZNEXT
MOVCX,COUNT1;循环比较字符串的每个字符
LEASI,STRING1
LEADI,STRING2
L:
MOVAL,[SI]
CMPAL,[DI]
JNZNEXT;如果不相同就jmp到next段执行
INCSI
INCDI
LOOPL
LEADX,ANSWER1;两个字符串匹配
MOVAH,9
INT21H
JMPFINAL
NEXT:
LEADX,ANSWER2;两个字符串不匹配
MOVAH,9
INT21H
FINAL:
MOVAH,4CH
INT21H
CODESENDS
ENDSTART
2-4
DATASSEGMENT
MDB4DUP（8,-2,2,-3,-5）
PDW0
NDW0
S1DB"Thenumberofpositivenumbers:
",'$'
S2DB13,10,"Thenumberofnegativenumbers:
",'$'
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
LEASI,M
MOVCX,20
L:
MOVAL,[SI]
CMPAL,0;每个数跟0比较
JLL1;负数jmp到L1
JGL2;正数jmp到L2
L1:
INCN
JMPL3
L2:
INCP
JMPL3
L3:
INCSI
LOOPL
LEADX,S1
MOVAH,9
INT21H
LEADI,P
MOVAX,[DI];输出正数的个数
MOVBL,10d
DIVBL
MOVDL,AL
MOVBH,AH
ADDDL,30H
MOVAH,2
INT21H
MOVDL,BH
ADDDL,30H
MOVAH,2
INT21H
LEADX,S2
MOVAH,9
INT21H
LEADI,N
MOVAX,[DI];输出负数的个数
MOVBL,10d
DIVBL
MOVDL,AL
MOVBH,AH
ADDDL,30H
MOVAH,2
INT21H
MOVDL,BH
ADDDL,30H
MOVAH,2
INT21H
MOVAH,4CH
INT21H
CODESENDS
ENDSTART
3-1
DATASSEGMENT
DATADW10DUP（5,6,-4,-5,8,9,10,188,-178,-255）
COUNTDW（$-DATA）/2
COUNT1DW0
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
MOVCX,COUNT
LEASI,DATA-2
L1:
ADDSI,2;寻找第一个偶数放在AX
MOVAX,[SI]
DECCX
TESTAL,01H
JNZL1
L2:
ADDSI,2;寻找第二个偶数放在BX
MOVBX,[SI]
CMPCX,0;如果到达数组的末尾则退出
JZL4
DECCX
TESTBL,01H
JNZL2
CMPAX,BX
JGL3
JMPL2
L3:
MOVAX,BX;AX>BX，两者交换寄存器内容
JMPL2
L4:
MOVAH,4CH;程序退出
INT21H
CODESENDS
ENDSTART
3-2
DATASSEGMENT
NUMDW0
CRLFDB13,10,'$'
DATASENDS
STACKSSEGMENT
STACKSENDS
CODESSEGMENT
ASSUMECS:
CODES,DS:
DATAS,SS:
STACKS
START:
MOVAX,DATAS
MOVDS,AX
MOVDX,0
MOVCX,4
L:
MOVAH,1
INT21H
CMPAL,40H
JGL1
JLL2
L1:
SUBAL,07H;大写字母多减7
L2:
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