35: 444648 411 413416

TABLE0~9X0~9XALDATA SEGMENT TABLE DB 0149162536496481 BUF DB Please input one number0DH0AH,$DATA ENDSSTACK SEGMENT PARA STACK STACK DB 50 DUP TOP THIS WORDSTACK ENDSCODE SEGMENT ASSUME CSCODEDSDATASS STACKMAIN PROC FAR :TOP

MAIN ENDP MAIN CODE ENDS END START START MOV AXDATA MOV DSAX MOV AXSTACK MOV SSAX MOV SP OFFSET TOP SP MOV BXOFFSET TABLE BXNEXT MOV DXOFFSET BUF MOV AH9 9 INT 21 MOV AH1 1,( INT 21 AL MOV AH0 AND AL 0FH ADD BXAX MOV AL[BX] AL MOV AH4CH DOS INT 21H RET DOS

4-1

1. ASCII2. SEGMENTOFFSETTYPE

3. CALLSEGMENTOFFSETTYPENEARFAR

42 MASM + * / MOD SHL SHR

43 CPUMASMDBDWDDDQDTEQUSEGMENTENDSASSUMEPROC ENDPORGENDNAME

44 DOS DOSPC/XTDOSDOS * DOSDOS * DOSBIOSINT n n= 0 ~ 4 8088/8086CPU n= 5 ~ 1FH BIOS n= 20 ~ 3FH DOSINT 21100

DOSINT 21

1

*

AL=

2

DL=

7

AL=

8

*

AL=

9

($)

DSDX=

0A

DSDX=

4C

DOS

AL=

BUFINAH 09H01H09H0AH09H4CH

DATASEGMENTSTRING1DB DO YOU WANT TO INPUT DB STRING(Y/N)0DH0AHSTRING2DB PLEASE INPUT STRING. DB 0DH0AHBUFIN DB 20H 20HBUFINI DB 20H DUP(?) DATAENDSCODESEGMENTASSUME CSCODEDSDATAESDATASTARTPROC FARBEGINGPUSH DS MOV AX0 PUSH AX MOV AXDATA MOV DSAX MOV ESAX DSES LEA DXSTRING1 MOV AH09H INT 21H STRING1 MOV AH01H INT 21H 1AL

CMP ALYJNE DONELEA DXSTRING2MOV AH09HINT 21H STRING2LEA DXBUFINMOV AH0AHINT 21H BUFINMOV ALBUFIN1CBW BUFIN LEA SIBUFIN2ADD SIAX SI MOV [SI] MOV AH09HLEA DXBUFIN2INT 21H DONERETSTARTENDPCODEENDSEND BEGIN

45

132*+

name 32 bit multiplyDATA SEGMENTMULNUM DW 00000FFFFH00000FFFFH4DUP( ?) DATA ENDSSTACK SEGMENT PARA STACK STACKSTAK DB 100 DUP TOP EQU LENGTH STAKSTACK ENDSCODE SEGMENT ASSUME CSCODEDSDATASS STACK ES DATASTART PROC FARBEGIN PUSH DS MOV AX0 PUSH AX MOV AX, DATA MOV DSAX MOV ES AX MOV AXSTACK MOV SSAX MOV SP OFFSET TOP SP

LEA BXMULNUMMULU32: MOV AX [BX] ; B AX MOV SI [BX+4] ; DSI MOV DI [BX+6] ; CDI MUL SI ; B*D MOV [BX+8] AX ; 1 MOV [BX+0AH] DX MOV AX [BX+2] ; AAX MUL SI ; A*D ADD AX [BX+0AH] ADC DX 0 ; 2L1H MOV [BX+0AH] AX 1 MOV [BX+0CH] DX MOV AX [BX] ; BAX MUL DI ; C*B3

ADD AX [BX+0AH] 31 ADC DX [BX+0CH] MOV [BX+0AH] AX 2 MOV [BX+0CH] DX PUSHF MOV AX [BX+2] A AX MUL SI AC4 POPF ADC AX [BX+0CH] ; 4L2H ADC DX 0 MOV [BX+0CH] AX MOV [BX+0EH] DX ; 3 RETSTART ENDP CODE ENDS END BEGIN

1 2BUFFER(X)BX(Y)

3BUFNN

2 8P1P2 P88 MOV AH1 INT 21H 1 CMP AL1 JE P1 1P1 CMP AL2 JE P2 2P2

CMP AL8 JE P8 8P8 JMP ST P1 1 P2 2

P8 8 ST HLT

31=+ AND AL0FH ADD ALALADD BXAXJMP WORD PTR [BX]MOV BXOFFSET BASE

MOV AH1 ALINT 21HAND AL0FHMOV AH0MOV BLALADD ALALADD ALBL =*3MOV BXOFFSET BASEADD BXAX JMP BX 2

3

4BUFFERN=10M=80DX98AX CX=9AX CX=8AX CX=7AX CX=6AX CX=5AX CX=4AX CX=3AX CX=2AX CX=1AX CX=0AX=80 CX=10 DX=10AX BUFFER[SI] 9082AX BUFFER[SI-2] AX BUFFER[SI-2] 80DX=11AX BUFFER[SI-2] MSI=2*DX1CMP AXBUFFER[SI] MOV DIOFFSET BUFFERCLDREPNE SCASWMOV BXBUFFER[SI]MOV BUFFER[SI+2]BXMOV BUFFER[SI+2]AX

AX CX=9 DI=BUFFER+2AX CX=8 DI=BUFFER+4AX CX=7 DI=BUFFER+6AX CX=6 DI=BUFFER+8AX CX=5 DI=BUFFER+AAX CX=4 DI=BUFFER+CAX CX=3 DI=BUFFER+EAX = CX=2 DI=BUFFER+10HAX=80 CX=10 DI=BUFFER9098BX=[DI]=BUFFER+10H DI-2 CX-1=1BX=[DI+2]=BUFFER+12H DI-2 CX-1=0DX=9M MOV DIOFFSET BUFFERCLDREPNE SCASW MOV BX[DI]MOV [DI-2]BXADD DI2

MAXNCXDXDI CLD

DATA SEGMENT BUFFER DW 5103247537789106115124 N DB 10 M EQU 80DATA ENDSCODE SEGEMENT ASSUME CSCODEDSDATAESDATAMAIN PROC FARSTART PUSH DS SUB AXAX PUSH AX MOV AXDATA MOV DSAX MOV ESAX MOV AXM AX MOV CXN CX MOV DXN MOV DIOFFSET BUFFER CLD REPNE SCASW

JE DEL ZF=1 DEC DX MOV SIDX ADD SIDXL1 CMP AXBUFFER[SI] JL L2 L2 MOV BUFFER[SI+2] AX JMP L3L2 MOV BXBUFFER[SI] MOV BUFFER[SI+2] BX SUB SI2 JMP L1L3 ADD DX1 JMP NEXT1DEL JCXZ NEXT DEL1 MOV BX[DI] MOV [DI-2]BX ADD DI2 LOOP DEL1NEXT DEC DX NEXT1 RETMAIN ENDPCODE ENDS END START

CX(CX)1CX(CX)0 5BLOCK10016bitMAX99()1

NAME FOUND DATA SEGMENT BLOCK DW 65C8H 35 694AH0A398H COUNT EQU ($BLOCK)/2 1 $ MAX DW ? MAXDATA ENDS STACK SEGMENT DB 100 DUP(?) 100STACK ENDS CODE SEGMENT ASSUME CSCODE DSDATASSSTACKFOUND PROC FAR DOSBEGIN PUSH DS DOSDS SUB AXAX DOS PUSH AX

MOV AXDATA MOV DSAX DS LEA BX BLOCK MOV AX[BX] INC BX INC BX MOV CXCOUNTAGAINCMP AX[BX] JG NEXT MOV AX[BX]NEXT INC BX INC BX LOOP AGAIN MOV MAXAX RET DOS FOUND ENDP CODE ENDS END BEGIN

2 616bit N=90000 X1=90000/200+2=452 X2=90000/452+452/ 2 = 326 X3=90000/326+326/ 2 = 301 X4=90000/301+301/ 2 = 300

3 * * *

BUFFER101 2 3

BUFFER(

BUFFER

BUFFER

BUFFER

BUFFER

1DATASEGMENTBUFFER DW 22-1240COUNT EQU BUFFER (COUNT=20)DATAENDS3BUFFERMOVAXBUFFER [SI]; ((SI)+OFFSET BUFFER) AX Ej AXCMPAX,BUFFER [SI-2]; EjEj-1 PSW2109MOVCXCOUNTMOVSICXDECSIDECSISHRCX120/210DECCX10-194XCHGAXBUFFER [SI-2]MOVBUFFER[SI]AX AX

1ASCII

()ASCII

ASCII

9

0H

30H

30H

1H

31H

2H

32H

3H

33H

4H

34H

5H

35H

6H

36H

7H

37H

8H

38H

9H

39H

10

AH

41H

37H

30H07H

BH

42H

CH

43H

DH

44H

EH

45H

FH

46H

ASCIIBUFFERSTRINGA42C533B4134433233354233

1AL 2ASCII1ASCIISI 2SI

P146313 NAME HEX_CHANGE_ASCIIDATASEGMANT L1 DW 2 216 STRINGDB 34H98H L2 DW 1 ASCII BUFFERDB 2*2 DUP (?) 4DATAENDSCODESEGMENTASSUME CSCODEDSDATA ESDATA

STARTPROC FARBEGINPUSH DSMOV AX0PUSH AX DOSDATAMOV AXDATAMOV DSAX DSMOV ESAX ESMOV CXL1LEA BXSTRING LEA SIBUFFER MOV AXCXSAL CX1 L2MOV L2CXMOV CXAX

AGAIN MOV AL[BX]AL DLMOV DLALAND AL0FH 404CALL CHANGE ASCIIMOV ALDL PUSH CX CLCXMOV CL4 44SHR ALCL 40POP CX CXCALL CHANGE ASCIIINC BX LOOP AGAIN RETSTARTENDP

CHANGE PROCCHANGECMP AL10JL ADD_0ADD ALA010 ASCII07H ADD_0 ADD AL0 MOV [SI]AL INC SI RETCHANGE ENDPCODE ENDS END BEGIN

2ASCII(BCD) STRINGASCIIBCDBUFFEASCIIL1BCDBUFFE

() BUFFERKEY1

NAMEADD_KEYDATASEGMENTBEFFERDB 10,ABCDEFGHIJDB KEYDB $DATAENDSCODESEGMENTASSUME CSCODEDSDATASTARTPROCFARBEGINPUSHDSMOVAX0PUSHAXMOVAXDATAMOVDSAXMOVESAX

LEADIBUFFER MOVCH0MOVCL[DI] INCDI CLDMOVALKEYREPNZ SCASBJEDONEMOV[DI]ALINCBUFFERDONERETSTARTENDPCODE ENDSENDBEGIN

STRINGCHARCHAR60 PTRN1PTRN

1() INT[()/2]2 > < 3 (INT)

(PROC)CALLRET

* * * *

* PROC CSCALL (NEAR) PROC CSCALL FAR* (1) (2) (3)()*

BCD2BINBCDCXALBCDALBCD2BIN PROC NEARFAR PUSH CX MOV CHAL AND CH0FH MOV CL4 SHR ALCL /16 MOV CL10 MUL CL *10 ADD ALCH + POP CX RETBCD2BIN ENDP* * PUSHPOP

MOV CXLENGTHMOV BXOFFSET BUFFER1MOV SI OFFSET BUFFER2CALL SUBR

DATA SEGMENT ARY1 DW 100 DUP SUM1 DW ARY2 DW 100 DUP SUM2 DW DATA ENDSSTACK SEGMENT STACK SA DW 50 DUP TOP EQU LENGTH SASTACK ENDSCODE SEGMENT ASSUME CS CODEDSDATASSSTACKMAIN PROC FARSTART PUSH DS SUB AXAX PUSH AX MOV AXDATA MOV DSAX MOV AXSTACK MOV SSAX MOV SPTOP

LEA SIARY1 MOV CXLENGTH ARY1 CALL SUM LEA SIARY2 MOV CXLENGTH ARY2 CALL SUM RETMAIN ENDPSUM PROC NEAR XOR AXAXL1 ADD AXWORD PTR[SI] INC SI INC SI LOOP L1 MOV WORD PTR [SI]AX RETSUM ENDPCODE ENDS END STARTSI

CALL SUBRDW BUFLDW BUFADW BUFB* * * PUSH BP BP MOV BPSP

MOV BX[BP+2] IPBX MOV CX[BX] BUFLCX MOV SI[BX+2] BUFASI MOV DI[BX+4] BUFBDI

ADD BX6 MOV [BP+2]BX

POP BP RETSP-1SP-1BPLBPH

DATA SEGMENTBUFFER1 DW BUFABUFFER2 DW BUFBLENGTH DW BUFL

DATA ENDSLEA BXBUFFER1PUSH [BX] PUSH [BX+2]PUSH [BX+4]CALL SUBRSUBR PUSH BP MOV BPSP MOV CX[BP+4] MOV DI [BX+6] MOV SI [BX+8]

POP BP RET 6SP-2SP-1SPIPHBUFAH BUFALBUFLLBUFBLBUFLHBUFBHIPLSP-7SP-5SP-6SP-8SP-4SP-3BPLBPHSP-9SP-A

MDATA SEGMENT ARY1 DB 20 DUP SUM1 DW ARY2 DW 100 DUP SUM2 DW MDATA ENDSMSTACK SEGMENT STACK SB DW 100 DUP TOP EQU LENGTH SBMSTACK ENDSMCODE SEGMENT ASSUME CS MCODEDSMDATASSMSTACKMAIN PROC FARSTART PUSH DS SUB AXAX PUSH AX MOV AXMDATA MOV DSAX MOV AXMSTACK MOV SSAX MOV SPTOP

MOV AXOFFSET ARY1 PUSH AX MOV AXSIZE ARY1 PUSH AX CALL FAR PTR PADD MOV AXOFFSET ARY2 PUSH AX MOV AXSIZE ARY2 PUSH AX CALL FAR PTR PADD RETMAIN ENDPMCODE ENDSPCODE SEGMENT ASSUME CS PCODEDSMDATASSMSTACKPADD PROC FAR PUSH BX PUSH CX PUSH BP MOV BPSP PUSHF

MOV CX[BP+10] MOV BX[BP+12] MOV AX0NEXT ADD AL[BX] DAA MOV DLAL MOV AL0 ADC ALAH DAA MOV AHAL MOV ALDL INC BX LOOP NEXT MOV [BX]AX POPF POP BP POP CX POP BX RET 4PADD ENDPPCODE ENDS END START

DATA SEGMENT P DW 125368 SUM DW DATA ENDS

MOV SIOFFSET PCALL PADD

PADDAXBXCXDXMOV AX[SI] ADD AX[SI+2] MOV SUMAX CALL DISPAXBXCXDXRETDISPBX04HCH ASCIIRET

NN>=0N=N*N-1*N-2 *1 N=1 N=0 N= N*N-1NFACT NAL=NDX=NCX

DATA SEGMENT D1 DB 6 D2 DW 2 DUP DATA ENDS

MOV BXOFFSET D1MOV AL[BX]CALL FACTMOV [BX+1]DX

FACT

SEGMENT ....ENDS SEGMENT ENDS SEGMENT .ENDSSEGMENT ....ENDSSEGMENTENDS

Align Type* BYTE* WORD* PAGE256* PARAPARA

Combine Type* NONE NONE* PUBLIC * COMMON* AT16* STACK* MEMORY

Class Name

ASSUMEASSUME CSDSSSES ASSUMECS SSSP

16NUMBERASCIIBCDDATASEGMENTTABLEDB 0123456789ABCDEF ASCIIDB 012345678910H11H12H DB 13H,14H15H BCDDB 013298 BUFFERDB 3 DUP(?) (3)DATAENDS

1 2

2XLATMOVBXTABLEMOVAL NUMBERXLAT XLAT (BX) (AL)1 LEASI TABLEMOVBXNUMBERMOVAL[SI][BX] (SI) ASCIITABLE BCD TABLE16 TABLE32 (BX)