微型計(jì)算機(jī)原理實(shí)驗(yàn)

1、實(shí)驗(yàn)一：輸出字符A*的源程序如下： PROG SEGMENT ASSUME CS:PROG START: MOV DL,7VMOV AH,2 INT 21H MOV AH,4CH INT 21H PROG ENDS END START實(shí)驗(yàn)二：1.把BX中的二進(jìn)制數(shù)轉(zhuǎn)換成十進(jìn)制數(shù)，在屏幕上顯示出來(lái)，只考慮無(wú)符 號(hào)數(shù)。程序如下：CODE SEGMENTASSUME CS:CODE START: MOV BX,0FFFHMOV CX, 10000 CALL DEC_DIV MOV CX, 1000 CALL DEC_DIV MOV CX, 100 CALL DEC_DIVMOV CX, 10 CAL

2、L DEC_DIV MOV CX,1 CALL DEC_DIV MOV AH,4CH INT 21HDEC_DIV PROC NEARMOV AX,BX MOV DX,0 DIV CX MOV BX,DX MOV DL,AL ADD DL,30H MOV AH,2 INT 21H RETDEC_DIV ENDP CODE ENDS END START2.把BX中的帶符號(hào)數(shù)轉(zhuǎn)換成十進(jìn)制數(shù)，在屏幕上顯示出來(lái)。程序如下:CODE SEGMENTASSUME CS:CODESTART: MOV BX,8001HMOVANDJNZJMPAX,8000H AX,BX MINUS DISPMINUS: MO

3、V DL；-*MOVINTNEGJMPAH,2 21HBXDISPDISP: MOV CX, 10000CALLMOVCALLMOVCALLMOVCALLMOVCALLMOVINTDEC_DIV CX, 1000 DEC_DIV CX, 100 DEC_DIV CX, 10 DEC_DIV CX,1 DEC_DIV AH,4CH 21HDEC DIV PROC NEARMOVMOVDIVMOVMOVADDMOVINTRETAX,BXDX,0 exBX,DXDL,AL DL,30H AH,2 21HDEC_DIV ENDPCODE ENDSENDSTART3. 求一個(gè)數(shù)據(jù)塊（由10個(gè)單字節(jié)的無(wú)符

4、號(hào)數(shù)組成）中的最大元素，并將結(jié) 果在屏幕上顯示出來(lái)，程序如下：DATA SEGMENTBLOCK DB1,0,5,7,10,30,100,127,90,80RESULT DB?DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATABEGIN PROC FARMOVAX, DATAMOVDS,AXMOVCX,9LEASI,BLOCKMOVAL,SIX1:INCSICMPAL,SIJAEX2MOVAL,SIX2: LOOPX1MOVRESULT,ALMOVAH ,0MOVBX,AXCALLXIANSHIMOVAH,4CHINT21HBEGIN ENDPXIANSHI

5、 PROC NEARAL,80HAL,BLMINUSDISPDL?AH,221HBLDISPCX,100DEC_DIVCX, 10DEC_DIVCX,1DEC_DIVAH,4CH21HMOVANDJNZJMPMINUS: MOVMOVINTNEGJMPDISP: MOVCALLMOVCALLMOVCALLMOVINTXIANSHI ENDPDEC_DIV PROC NEARMOV AX,BXMOV DL,0DIVCLMOVBL,AHMOVBH,0MOVDL,ALADDDL,30HMOVAH,2INT21HRETDEC_DIV ENDPCODE ENDSENDBEGIN4. 求一個(gè)數(shù)據(jù)塊（由20

6、個(gè)單字節(jié)的帶符號(hào)數(shù)組成）中的正數(shù)和（W字）和 負(fù)數(shù)和（W字），并在屏幕上用十進(jìn)制的形式顯示出兩個(gè)和。程序如下： DATA SEGMENT BLOCK DW -100,100,200,-200,5,6,7,8,9,10DW 11,12,13,14,15,50,-50,150,-150,-200 POSIT DW ? NEGAT DW ?ST1 DB The sum of all the positive numbers:$*ST2 DB The sum of the negative numbers:$*V o MV V o oM MV V o o M MV o MX1: MOVCMPJGEAD

7、DJMPX3: ADDX2: ADDLOOPMOVMOVMOVMOVMOVAX, DATADS,AXBX,OFFSET BLOCKSI,0DI,0CX,20AX,BXAX,0X3DI,AXX2SI,AXBX,2X1POSIT,SINEGAT,DIBX,SIDX,OFFSET ST1AH,9INT 21HCALL XIANSHIMOV DL,0DHMOVAH,2INT 21HMOV DL,0AHMOVAH,2INT 21HMOV BX,NEGATNEG BXAND BX,7FFFHMOVDX,OFFSET ST2MOVAH,9INT 21HMOV DLLMOVAH,2INT 21HCALL XI

8、ANSHIMOV AH,4CHINT 21HSTARTENDPXIANSHI PROC NEARMOVCX, 100CALL DEC_DIV MOVCX, 10CALL DEC_DIV MOV CX,1 CALL DEC_DIV RETXIANSHI ENDPDEC_DIV PROC NEARMOV AX,BXMOV DX,0DIV CXMOV BX,DXMOV DL,ALADD DL,30HMOVAH,2INT 21HRETDEC_DIV ENDPCODE ENDSEND START5. 將寄存器BX中的二進(jìn)制數(shù)轉(zhuǎn)換成十六進(jìn)制數(shù)并在屏幕上顯示出來(lái)。程序如下：CODE SEGMENTASSUM

9、E CS:CODE BINHEX PROC FARMOVCH,4MOV BXJ000ROTATE: MOV CL,4ROL BX,CLMOV DL,BLAND DL,0FHADD DL,30HCMP DL,3AHJL OUTPUTADD DL,7OUTPUT: MOVAH,2INT 21HDEC CHJNE ROTATEMOV DL；H*MOVAH,2INT 21HMOV AH,4CHINT 21HBINHEX ENDP CODE ENDS END BINHEX實(shí)驗(yàn)三：1.從鍵盤上輸入一個(gè)十進(jìn)制數(shù)（065535）,轉(zhuǎn)換成二進(jìn)制數(shù)并放入寄存器 BX中，其程序框圖如下：程序如下：CODE SEGM

10、ENTASSUME CS:CODE START PROC CALL DECBIN CALL XIANSHI MOV AH,4CH INT 21H START ENDPDECBIN PROC NEARMOVCX,10MOV BX,0LOP1:MOV AH,1INT 21HCMP AL,30HJL EXITCMP AL,39HJG EXITSUB AL,30HMOVAH,OOHXCHG AX,BXMUL CXADD BX,AXJMP LOP1 EXIT: RET DECBIN ENDPXIANSHI PROCLP1: MOVNEARCX,10000CALLMOVCALLMOVCALLMOVCALL

11、MOVCALLDEC_DIVCXJOOODEC_DIVCX,100DEC_DIVCX,10DEC_DIVCX,1DEC DIVRETXIANSHI ENDPDEC_DIV PROC NEARMOV AX,BXMOV DX,0DIV CXMOV BX,DXMOV DL,ALADD DL,30HMOV AH,2 INT 21H RETDEC.DIV ENDPCODE ENDS END START2.從鍵盤上輸入。65535范圍的一個(gè)十進(jìn)制數(shù)，在屏幕上顯示出相應(yīng)的十 六進(jìn)制數(shù)。程序如下：CODE SEGMENTASSUME CS:CODE START PROC CALL DECBIN MOV CH,

12、4 CALL ROTATE MOV AH,4CH INT 21H START ENDPDECBIN PROC NEARMOV CX,10MOV BX,0LOP1:MOV AH,1INT21HCMPAL,30HJLEXITCMPAL,39HJGEXITSUBAL,30HMOVAH,OOHXCHGAX,BXMULCXADDBX,AXJMPLOP1EXIT: RETDECBIN ENDPROTATE PROCLOP2: MOV CL,4ROLBX,CLMOVDL,BLANDDL,0FHADDDL,30HCMPDL,3AHJLOUTPUTADDDL,7OUTPUT: MOVAH,2INT21HDECC

13、HJNELOP2MOVDL,HMOVAH,2INT21HMOVAH,4CHINT21HROTATE ENDPCODE ENDSENDSTART實(shí)驗(yàn)四:1.在內(nèi)存中存有-字符串，以0為結(jié)尾，程序開(kāi)始輸出HELLO然后等待從鍵盤輸入一字符，再改字符申中尋找該字符，若找到，輸出 yes：若找不到，輸出n。，然后再輸入下一字符.程序如下：DATASEGMENTSTR1DB,HELLOODH.OAH.,$,STR2DB20H；YES,.0DH,0AH.,$,STR3DB20H；NO,0DH.0AH：$,STR4DB,1 2 3 0 4 5 A B a=! ?,00HDATAENDSCODESEGMENT

14、ASSUMECS:CODE,DS:DATASTARTPROCFARMOVAX.DATAMOVDS,AXMOVDX,OFFSET STR1MOVAH,9INT21HLOOP1:MOVAH.1INT21HMOVBX,OFFSET STR4GON:MOVAH.BXCMPAH.OJZNOINCBXCMPAH.ALJNZGONMOVDX,OFFSET STR2GO:MOVAH,9INT21HJMPLOOP1NO:MOVDX,OFFSET STR3JMPGOSTARTENDPCODEENDSENDSTART2.實(shí)驗(yàn)內(nèi)容1的程序是個(gè)無(wú)限循環(huán)程序，若按ESC植.讓程序退出術(shù)環(huán).是系統(tǒng)返回DOS-已知-ESC,鍵的鍵值是1BH,按照上儷變求對(duì)實(shí)驗(yàn)內(nèi)容1的程序進(jìn)行修改，然后重新匯編、鏈接和運(yùn)行.程序如下：DATASEGMENTSTR1DBHELLO1,0DH,0AH.,$,STR2DB20H；YES,0DHf0AH：$,STR3DB20H；NO,0DH.0AH：$,STR4DB,1 2 3 0 4 5 A B a=! ?00HDATAENDSCODESEGMENTASSUMECS:CODE,DS:DATASTA