微机原理与接口技术设计试验

1、实验一：编写程序，比较两个字符串 STRING1 和 STRING2 所含的字符是否相 同，若字符相同则显示“ Match” ,否则显示“ No Match”参考程序：DATA SEGMENTSTRING1 DB 'HAPPY ASM'LEN EQU $-STRING1STRING2 DB 'HAPPY ASM'MESSAGE1 DB 'MATCH',0DH,0AH,'$'MESSAGE2 DB 'NO MATCH',0DH,0AH,'$'DATA ENDSCODE SEGMENTASSUME CS

2、:CODE,DS:DATA,ES:DATASTART:MOV AX,DATAMOV DS,AXMOV ES,AXLEA SI,STRING1LEA DI,STRING2MOV CX,LENCOMPARE:MOV AL,SIMOV BL,DICMP AL,BLJNE DISMATCHINC SIINC DILOOP COMPAREMATCH:LEA DX,MESSAGE1JMP DISPDISMATCH:LEA DX,MESSAGE2DISP: MOV AH,09HINT 21HMOV AH,4CHINT 21HCODE ENDSEND START实验二：编写程序，从键盘输入一串字符，以 $&#

3、39;或回车结束，将其中的小写 字母转变为大写字母，其余字符不做转换，原样输出，结果显示在屏幕上。 参考程序：DATA SEGMENTBUF DB 50DB ?DB 50 DUP(?)INPUTSTRING DB 'PLEASE INPUT A STRING:','$'OUTPUTSTRING DB 'OUTPUTSTRING IS:','$'ENTERSTRING DB 0DH,0AH,'$'DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATASTART:MOV AX,DATAM

4、OV DS,AXLEA DX,INPUTSTRINGMOV AH,09HINT 21HLEA DX,BUFMOV AH,0AHINT 21HLEA DX,ENTERSTRINGMOV AH,09HINT 21HLEA BX,BUFADD BX,2NEXT1:MOV AL,BXINC BXCOMPARE:CMP AL,24HJZ DISPCMP AL,61HJB NEXT1CMP AL,7AHJA NEXT1SUB AL,20HMOV BX-1,ALJMP NEXT1DISP:LEA DX,OUTPUTSTRINGMOV AH,09HINT 21HLEA DX,BUF+2MOV AH,09HIN

5、T 21HMOV AH,4CHINT 21HCODE ENDSEND START实验三：利用子程序方法编写程序，设有 10 个无符号数的字节序列，查找该序 精选列中的最大值和最小值，并把结果显示在屏幕上 参考程序 1：(针对一位 10 进制数)STACK SEGMENT STACKDW 256 DUP(?)TOP LABEL WORDSTACK ENDSDATA SEGMENTBUF DB 00H,01H,02H,03H,04HDB 05H,06H,07H,08H,09HCOUNT EQU $-BUFENTERSTRING DB 0DH,0AH,'$'MAXSTRING DB

6、'THE MAXIMUN NUMBER IS:','$' MINSTRING DB 'THE MINIMUN NUMBER IS:','$' DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATA,SS:STACKSTART:MOV AX,DATAMOV DS,AXMOV AX,STACKMOV SS,AXLEA SP,TOPMOV CX,COUNTCALL BRANCHPUSH AXLEA DX,MAXSTRINGMOV AH,09HINT 21HPOP AXMOV DL,AHADD DL,30H

7、PUSH AXMOV AH,02HINT 21HLEA DX,ENTERSTRINGMOV AH,09HINT 21HLEA DX,MINSTRINGMOV AH,09HINT 21HPOP AXMOV DL,AL精选ADD DL,30HMOV AH,02HINT 21HMOV AH,4CHINT 21HBRANCH PROC NEARJCXZ NEXT4PUSH SIPUSH CXPUSH BXMOV BH,SIMOV BL,BHCLDNEXT1: LODSBCMP AL,BHJBE NEXT2MOV BH,ALJMP NEXT3NEXT2: CMP AL,BLJAE NEXT3NEXT3:

8、 LOOP NEXT1MOV AX,BXPOP BXPOP CXPOP SINEXT4: RETBRANCH ENDPCODE ENDSEND START参考程序二：(针对两位十六进制数或无符号数)STACK SEGMENT STACKDW 256 DUP(?)TOP LABEL WORDSTACK ENDSDATA SEGMENTBUF DB 0FFH,55H,33H,44H,54HDB 45H,46H,47H,48H,1AHCOUNT EQU $-BUFENTERSTRING DB 0DH,0AH,'$'MAXSTRING DB 'THE MAXIMUN NUMBE

9、R IS:','$'MINSTRING DB 'THE MINIMUN NUMBER IS:','$'DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATA,SS:STACKSTART:MOV AX,DATAMOV DS,AXMOV AX,STACKMOV SS,AXLEA SP,TOPMOV SI,OFFSET BUFMOV CX,COUNTCALL BRANCHMOV DX,AXPUSH DXLEA DX,MAXSTRINGMOV AH,09HINT 21HPOP DXMOV AL,DHPUSH DXC

10、ALL DISPGAO4POP DXMOV AL,DHPUSH DXCALL DISPDI4LEA DX,ENTERSTRINGMOV AH,09HINT 21HLEA DX,MINSTRINGMOV AH,09HINT 21HPOP DXMOV AL,DLPUSH DXCALL DISPGAO4POP DXMOV AL,DLCALL DISPDI4MOV AH,4CHINT 21HBRANCH PROC NEARJCXZ NEXT4PUSH SIPUSH CXPUSH BXMOV BH,SIMOV BL,BHCLDNEXT1: LODSBCMP AL,BHJBE NEXT2MOV BH,AL

11、JMP NEXT3NEXT2: CMP AL,BLJAE NEXT3MOV BL,ALNEXT3: LOOP NEXT1MOV AX,BXPOP BXPOP CXPOP SINEXT4: RETBRANCH ENDPDISPDI4 PROC NERR ；低四位AND AL,0FHMOV DL,ALCMP DL,9JLE NUM1ADD DL,7NUM1: ADD DL,30HMOV AH,02HINT 21HRET；高四位DISPDI4 ENDPDISPGAO4 PROC NERRSAR AL,4AND AL,0FHMOV DL,ALCMP DL,9JLE NUM2ADD DL,7NUM2:

12、ADD DL,30HMOV AH,02HINT 21HRETDISPGAO4 ENDPCODE ENDSEND START实验四： 8255交通灯参考程序：MY8255_AEQU288H;8255的 A 口地址MY8255_BEQU289H;8255的 B 口地址MY8255_CEQU28AH;8255的 C 口地址MY8255_MODEEQU28BH;8255的控制寄存器地址STACK1 SEGMENT STACKDW 256 DUP(?)STACK1 ENDSDATA SEGMENTLADB ?;定义数据变量LBDB ?DATA ENDSCODE SEGMENTASSUME CS:CODE

13、,DS:DATASTART: MOV AX,DATAMOV DS,AXMOV DX,MY8255_MODE;定义 8255工作方式MOV AL,80H;工作方式 0，A 口和 B 口为输出OUT DX,ALL1: MOV DX,MY8255_A ;写 A 口发出的数据， 1组绿灯亮 ,2组红灯亮MOV AL,24HOUT DX,ALCALL DALLY1MOV CX,05HL2: MOV DX,MY8255_A ;写 A 口发出的数据， 1组黄灯亮 ,2组红灯亮MOV AL,44HOUT DX,ALCALL DALLY2MOV DX,MY8255_A ;写 A 口发出的数据， 1组黄灯灭 ,2

14、组红灯亮MOV AL,04HOUT DX,ALCALL DALLY2LOOP L2L3: MOV DX,MY8255_A ;写 A 口发出的数据， 1组绿灯亮 ,2组红灯亮MOV AL,81HOUT DX,ALCALL DALLY1MOV CX,05HL4: MOV DX,MY8255_A ;写 A 口发出的数据， 1组黄灯亮 ,2组红灯亮MOV AL,82HOUT DX,ALCALL DALLY2MOV DX,MY8255_A;写 A 口发出的数据， 1组黄灯灭 ,2组红灯亮MOV AL,80HOUT DX,ALCALL DALLY2LOOP L4L5: MOV AH,01H;判断是否有按键

15、按下，调用功能号 1INT 16H;ROM BIOS 功能调用JZ L1;无按键则跳回继续循环，有则退出QUIT: MOV AX,4C00H;结束程序退出; INT 21H;DOS 系统功能调用DALLY1 PROC NEAR;软件延时子程序，东西方向红灯亮，南北方向绿灯亮PUSH CXY1:PUSH DIMOV CX,3FFHMOV DI,9000HX1:DEC DIJNZ X1LOOP Y1POP DIPOP CX精选RETDALLY1 ENDPDALLY2 PROC NEAR;软件延时子程序，黄灯闪烁（即亮与灭）的时间间隔，PUSH CXPUSH DIMOV CX,3FHY2:MOV D

16、I,9000HX2:DEC DIJNZ X2LOOP Y2POP DIPOP CXRETDALLY2 ENDPCODE ENDSEND START参考程序 2：流水灯MY8255_AEQU288HMY8255_BEQU289HMY8255_CEQU28AHMY8255_MODE EQU28BH;8255的 A 口地址;8255的 B 口地址;8255的 C 口地址;8255的控制寄存器地址STACK1 SEGMENT STACKDW 256 DUP(?)STACK1 ENDSDATA SEGMENTLA DB ? ;定义数据变量DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATASTART: MOV AX,DATAMOV DS,AX;工作方式 0，A 口和 B 口为输出MOV DX,MY8255_MODE;定义 8255工作方式MOV AL,80HOUT DX,ALMOV CX,0FFFFHMOV BL,80HL1: MOV DX,MY8255_A ;写 A 口发出的数据MOV AL,BLOUT DX,ALCALL DALLY1ROR BL,1LOOP L1QUIT: MOV AX,4C00H;结束程序退出INT 21H;DOS 系统功能调用DALLY1 PROC NEAR;软件延时子程序，东西方向红灯亮，南北方