实验二分支程序实验和循环程序实验.doc

1、实验二 分支程序实验和循环程序实验山东大学上篇】分支程序实验、实验内容：1、编写一个程序，显示 AL 寄存器中的两位十六进制数、程序流程图：三、实验过程:1用记事本编写源程序，并命名为shang.asm转换成.asm文件。交卓日希辑旧橹式Q) SSfV WBh(H) code segmentassume C5：codestart: roav al, 3ehTOOVbL alhrovdi.#!movci. qshrdld clcropjbencitladddl,7nexll：add dl, 30hmovah 2int21hmovdl,blanddld OfhCRpdl39jbenext 2add

2、dlt7nealadd dl. 30hITOVh, 2int21hmovah, 4chint21hcode endsendstart2.在dos系统中进行编译：曙 DOSBox 0.74, Cpu speed: 3000 cycles,. Frameskip Q Program： DOSBOXI = IWelcome to DOSBox .74For a short introduiction for neu users type： IHTROFor supp口rtEtl she! I commands type： HELPTo adjust the emu1ated CPU speedy u

3、se ctr1 FU and ctr1-F12 * To activate the key mapper ctr I IT.For more information read the README file in the DOSBox directory*HAUE FUH!The DOSBox Team http:/uww.dosbox * comE：sSET BLASTER=A22O I? DI H5 T6Z：moiiTit c d ：masm5iDrive C is mounted as locaI directory d:masm5sZ：c：HAUE FUN!Tlie DOS Box T

4、eam http : z/ujum . dosbox. comZ:SET BLASTER=AZ2O I? DI H5 T6Z:mDLmt c d ：Xmasm5Driue C is mouvited as local directory d :mas(n5Z:c:C : masm shaing. asmrlicrosoft (R) Macro Assembler Uersion 5.00Copyright (C) Microsoft Corp 1981-1985 1987. Al 1 rigJits reserved-Object filename Lshang,OBJ:Source list

5、ing CHUL.LST1:Cross-reference ENUL.CRFJ:5176G + 464784 Bytes symbol space free8 Warning ErrorsG Severe Errors3、用link.exe进行连接:CAI ink shangMicrosoft (R) Orlay Linker Ifersion 3.6GCopyright (C) Microsoft Corp 19S3- 1387,卅11 rights reserved.Run File ISHAMG.EXE：List File rMUL.NAPl：Libraries .LIBI:LINK :

6、 uarnitig L4G21: no stack segment4、运行程序，看到 al寄存器中的两位16进制数是3E。: shang . exe【下篇】循环程序实验、实验内容：1、编写一个程序，判别键盘上输入的字符；若是1-9字符，则显示之；若为 A-Z或a-z字符，均显示/ c/;若是回车字符CR其ASCII码为0DH），则自动结束程序，若为其 它字符则不显示，循环等待新的字符输入。二、程序流程图：YAL 60H?AL z ？开始AL 2FH?AL 9?AL 40H?AL 7FH?结束输入字符，在AL中存入其ASCI码输出AL输出c NAL=Odh?ALmasm xift.asmMicr

7、osoft (R) Macro Assembler Uersion 5.00Copyright (C) Microsoft Corp 1981-1385, 1987* All rights reserved *DhjEut f ilename Exia.OBJ):Source 1istin ENUL.LST1:Cross-reference ENUL.CRF):51770 + 464774 Bytes symbo1 space free0 Warning Errors0 Severe Errors3、用link.exe进行连接:S1ink xialicrosof t (R) Over lay Linker Uers ion 3.60opyright (C) Microsoft Corp 1983-1987 All rights reserved. un File EXIA.EXE:ist File IMULMAP: