微机原理上机作业.doc

微型计算机原理汇编程序

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上机作业：
验证求平均值的程序（x赋值1，y赋值3）原始程序：
DATAHESEGMENT
X DB 1
Y DB 3
Z DB ?
DATAHEENDS
CODEHESEGMENT
ASSUMECS:CODEHE,DS:DATAHE
START:PUSHDS
MOVAX,0
PUSHAX
MOVAX,DATAHE
MOVDS,AX
MOVAL,X
ADDAL,Y
MOVAH,00H
ADCAH,00H
MOVBL,02H
DIVBL
MOVZ,AL
RET
CODEHEENDS
ENDSTART
有输出：
DATAHESEGMENT
X DB 1
Y DB 3
Z DB ?
DATAHEENDS
CODEHESEGMENT
ASSUMECS:CODEHE,DS:DATAHE
START:PUSHDS
MOVAX,0
PUSHAX
MOVAX,DATAHE
MOVDS,AX
MOVAL,X
ADDAL,Y
MOVAH,00H
ADCAH,00H
MOVBL,02H
DIVBL
MOVZ,AL
ADDZ,30H
MOVDL,Z
MOVAH,2
INT21H
RET
CODEHEENDS
ENDSTART
验证查表求ASCII程序
原始程序：
DATASEGMENT
TABLEDB30H,31H,32H,33H,34H,35H
DB36H,37H,38H,39H,41H,42H
DB43H,44H,45H,46H
HEXDB4
ASCIDB?
DATAENDS
COSEGSEGMENT
ASSUMECS:COSEG,DS:DATA
START:MOVAX,DATA
MOVDS,AX
LEABX,TABLE
XORAH,AH
MOVAL,HEX
ADDBX,AX
MOVAL,[BX]
MOVASCI,AL
MOVAH,4CH
INT21H
COSEGENDS
ENDSTART

有输出：
DATASEGMENT
TABLEDB30H,31H,32H,33H,34H,35H
DB36H,37H,38H,39H,41H,42H
DB43H,44H,45H,46H
HEXDB4
ASCIDB?
DATAENDS
COSEGSEGMENT
ASSUMECS:COSEG,DS:DATA
START:MOVAX,DATA
MOVDS,AX
LEABX,TABLE
XORAH,AH
MOVAL,HEX
ADDBX,AX
MOVAL,[BX]
MOVASCI,AL
ADDAL,30H
MOVDL,AL
MOVAH,2
INT21H
MOVAH,4CH
INT21H
COSEGENDS
ENDSTART

编程求将键盘输入的小写字母转换为大写字母输出
CODE SEGMENT
ASSUMECS:CODE
START: MOV AX , DATA
MOV DS , AX
MOV AH , 01H
INT 21H
CMP AL , ‘a’
JB EXIT
CMP AL , ‘z’
JA EXIT
SUB AL , 20H
MOV DL , AL
MOV AH , 2
INT 21H
JMP START
EXIT: MOV AH , 4CH
INT 21H
CODE ENDS
END START
验证符号函数例题
验证例程的正确性,利用debug调试程序
将变量Y输出（利用2号中断）
原始程序：
DATAXSEGMENT
XDB-25
YDB?
DATAXENDS
CODEXSEGMENT
ASSUMECS:CODEX,DS:DATAX
START:PUSHDS
MOVAX,0
PUSHAX
MOVAX,DATAX
MOVDS,AX
MOVAL,X
CMPAL,0
JGELOOP1
MOVAL,0FFH
MOVY,AL
RET
LOOP1:JELOOP2
MOVAL,1
MOVY,AL
RET
LOOP2:MOVAL,0
MOVY,AL
RET
CODEXENDS
ENDSTART
有输出：(当x<0时，y的值为2)
DATAXSEGMENT
XDB-25
YDB?
DATAXENDS
CODEXSEGMENT
ASSUMECS:CODEX,DS:DATAX
START:
MOVAX,DATAX
MOVDS,AX
MOVAL,X
CMPAL,0
JGELOOP1
MOVAL,2
MOVY,AL