南邮微机原理试验一二

1、1.1 程序修改 .486DATA SEGMENT USE16 SUM DB ?,?MESG DB 25+9=DB 0,0,$N1 DB 9,0F0H N2 DB 25 DATA ENDS CODE SEGMENT USE16 ASSUME CS:CODE,DS:DATA BEG: MOV AX,DATA MOV DS,AX MOV BX,OFFSET SUM MOV AH,N1 MOV AL,N2 ADD AH,AL MOV BX,AH CALL CHANGMOV AH,9 MOV DX,OFFSET MESGINT 21H MOV AH,4CHINT 21HCHANG PROCLAST:C

2、MPBYTEPTRBX,10 JCNEXT SUBBYTEPTRBX,10 INCBYTEPTRBX+7 MOVAH,BYTEPTRBX JMPLASTNEXT: MOV DX,WORD PTR SUM ADD BX+8,DX ADD BYTE PTR BX+7,30H ADD BYTE PTR BX+8,30H RET CHANG ENDP CODE ENDS END BEG2.3.4从数据段NUM单元开始存有9个有符号数，并编写一个程序实现：找出最小值存放到数据段MIN单元，并将负数的个数以十进制的形式显示在屏幕上。 .486 DATA SEGMENT USE16 NUM DB -8,-4

3、4,-88,-37,2,-1,8,-26,-18MIN DB ?AB DB 0DATA ENDS CODE SEGMENT USE16 ASSUME CS:CODE,DS:DATABEG: MOV AX,DATAMOV DS,AX MOV BX,OFFSETNUMMOV CH,0MOV CL,9 AGAIN:CMP BYTEPTRBX,0JG NEXT1INC AB CMP BYTEPTRBX,CHJG NEXT1 MOV CH,BYTEPTRBXNEXT1:INC BYTEPTRBXDEC CL JNE AGAINMOV MIN,CHMOV AH,2MOV DL,ABINT 21H MOV

4、AH,4CHINT 21HCODE ENDSENDBEG.486DATA SEGMENT USE16BUF1 DB BUF2 DB BUF3 DB Please input communication words:,0DH,0AH,$BUF4 DB 3OUT1 DB ERRORS,0DH,0AH,$OUT2 DB RIGHT,0DH,0AH,$OUT3 DB *,$OUT4 DB 0DH,0AH,$DATA ENDSCODE SEGMENT USE16ASSUME CS:CODE,DS:DATA,ES:DATABEG: MOV AX,DATA MOV DS,AX MOV ES,AX MOV A

5、H,00H MOV AL,3 INT 10HLAST1:LEA SI,BUF1 LEA DI,BUF2 MOV BX,OFFSET BUF2 MOV CX,6 MOV AH,09H LEA DX,BUF3 INT 21HLAST: MOV AH,07H INT 21H MOV BYTE PTR BX,AL INC BX MOV AH,09H MOV DX,OFFSET OUT3 INT 21H LOOP LAST MOV AH,09H LEA DX,OUT4 INT 21H MOV CX,6 CLD REPE CMPSB JZ EXIT MOV AH,09H LEA DX,OUT1 INT 21H DEC BUF4 JZ LAST2 JMP LA