微型计算机原理与接口技术部分例题整理.docx

例4.1在屏幕上显示并打印字符串“This is a sample program”。DATASEGMENT；数据段DA1DB‘This is a sample program.’DB0DH,0AH, ‘$’DATAENDSSTACKSEGMENTST1DB100 DUB(?)STACKENDSCODESEGMENT；代码段MAINPROCFARASSUME CS:CODE, DS:DATA, SS:STACKORG1000HSTART:PUSHDS；正常返回所需段地址及偏移地址MOVAX, 0PUSHAXMOVAX, DATA；送数据段段地址MOVDS, AXMOVAX, STACK；送堆栈段地址MOVSS, AXMOVAH, 9;DOS 9号功能调用，显示字符串MOVDX, OFFSET DA1INT21HRETMAINENDPCODEENDSENDSTART例4.27两个16位无符号二进制数相乘DDATA SEGMENT；数据段D1 DW 1234HD2 DW 5678HP1 DD ?P2 DD ?DDATA ENDSEDATA SEGMENT；附加段E1 DB ?E2 DW 4 DUP (?)EDATA ENDSSSTACK SEGMENT STACK ‘STACK’ STT DW 100 DUP (?)TOP EQU LENGTH STTSSTACK ENDS CCODESEGMENTMAIN PROC FARASSUME CS:CCODE, DS:DDATA, ES:EDATA, SS:SSTACKSTART:MOV AX, SSTACK ；初始化SSMOV SS, AXMOV SP, TOPPUSH DS；返回DOS用SUB AX, AX PUSH AXMOV AX, DDATA ；初始化DSMOV DS，AXMOV AX, EDATA ；初始化ESMOV ES, AXL1: MOV BX, OFFSET D1 ；D1*D2，积在（DX，AX）MOV AX, [BX]MOV DX, 0MUL WORD PRT [BX+2]MOV BX, OFFSET P1 ；积→P2和P1所指向的存储单元MOV [BX], AXMOV [BX+2], DXRETMAIN ENDPCCODE ENDSEND START例4.28用过程调用的方法，将内存中N个BCD码相加DATASEGMENTONE DB 22,33,44,55TWO DB 55,66,77,88SUM DB 20 DUP(?)DATA ENDSSTACK SEGMENT STACK‘STACK’STT DB 50 DUP(?)TOP EQU LENGTH STTSTACK ENDSCODE SEGMENTMAIN PROC FARASSUME CS:CODE, DS:DATA, SS:STACK， ES:DATASTART:MOV AX, STACKMOV SS, AXMOV SP, TOPPUSH DS；返回DOS调用SUB AX,AXPUSH AXMOV AX, DATAMOV DS, AXMOV SI, OFFSET ONE ；SI指向第一个加数MOV BX, OFFSET TWOMOV DI, OFFSET SUMCLD ；清方向标志CLC ；清进位标志MOV CX, 4LL: CALL ABCLOOP LLRETMAIN ENDPABC PROC NEAR；完成单字节数据加法运算LODSB ；[SI]→AL, SI+1→SI L1: ADC AL, [BX] ；相加DAA ；十进调整STOSB ；AL→[DI],DI+1→DIINC BX ；指针改变RETABC ENDPCODE ENDSEND START例4.55内存中TABLE开始存放0~9的平方值，通过人机对话，当任给定一个数X(0~9)，查表得X的平方值，放在AL中。DATASEGMENTTABLEDB 0,1,4,9,16,25,36,49,64,81BUFDB ‘Please input one number (0~9)：’，0DH,0AH