汇编第四次试验-武汉理工

汇编语言实验报告学院计算机科学与技术学院专业计算机科学与技术专业

班级

学号姓名实验时间：2011年11月

实验名称：I/O程序设计实验内容及要求：理解CPU对I/O设备的管理方法，以及数据传送方式。重点掌握中断程序的设计方法，以及DOS系统功能调用和BIOS调用。实验使用的关键技术和方法：关键技术方法DOS系统功能的调用MOVAH,01AL=输入字符INT21HMOVAH,02DL=输出字符INT21HMOVAH,09DS：DX=串地址INT21H子程序的调用与返回CallDSTret保存与恢复寄存器Pushaxpopax子程序的参数传送通过寄存器传送，通过存储器传送等1：阅读并调试《IBM-PC汇编语言程序设计实验教程》例3.9。在键盘上练习打字并统计时间：将例句显示在屏幕上，用户按照例句输入字符；当一个例句输入完后（回车键作为结束符），屏幕上以min:sec的格式显示输入时间。上述过程可以重复进行，当输入一个功能键时退出打字及时程序。2．习题8.14（选做）。3．设计并调试通过一个中断练习程序，要求实现以下功能：在主程序运行期间，每5秒钟响铃一次。当键盘上的某个键被按下时，显示一串字符；当键盘上的某个键再次被按下时，恢复主程序和响铃。（选做）实验设计方案说明：第一题代码STACKSEGMENTPARASTACK'STACK' DB256DUP(0)TOPLABELWORDSTACKENDSDATASEGMENTPARAPUBLIC'DATA' BUFFERDB16HDUP(0) BUFPT1DW0 BUFPT2DW0 KBFLAGDB0 PROMPTDB'*PLEASEPRACTISETYPING*',0DH,0AH,'$' SCANTABDB0,0,'1234567890-=',8,0 DB'qwertyuiop[]',0dh,0 DB'asdfghjkl;',0,0,0,0 DB'zxcvbnm,./',0,0,0 DB'',0,0,0,0,0,0,0,0,0,0,0,0,0 DB'789-456+1230.' EVEN OLDCS9DW? OLDIP9DW? STR1DB'abcdefghijklmnopqrstuvwxyz.' DB0DH,0AH,'$' STR2DB'christmasisatimeofjoyandlove.' DB0DH,0AH,'$' STR3DB'storewindowsholdtogsandgifts.' DB0DH,0AH,'$' STR4DB'peoplesendchristmascardsandgifts.' DB0DH,0AH,'$'STR5DB'santawishallpeoplepeaceonearth.'CRLFDB0DH,0AH,0AH,'$'COLONDB':','$'EVENSADDRDWSTR1,STR2,STR3,STR4,STR5COUNTDW0SECDW0MINDW0HOURSDW0SAVE_LCDW2DUP(?)DATAENDSCODESEGMENT ASSUMECS:CODE,DS:DATA,ES:DATA,SS:STACKMAINPROCFARSTART: MOVAX,STACK MOVSS,AX MOVSP,OFFSETTOP PUSHDS SUBAX,AX PUSHAX MOVAX,DATA MOVDS,AX MOVES,AX MOVAH,35H MOVAL,09H INT21H MOVOLDCS9,ES MOVOLDIP9,BX PUSHDS MOVDX,SEGKBINT MOVDS,DX MOVDX,OFFSETKBINT MOVAL,09H MOVAH,25H INT21H POPDS MOVAH,35H MOVAL,1CH INT21H MOVSAVE_LC,BX MOVSAVE_LC+2,ES PUSHDS MOVDX,SEGCLINT MOVDS,DX MOVDX,OFFSETCLINT MOVAL,1CH MOVAH,25H INT21H POPDS INAL,21H ANDAL,11111100B OUT21H,ALFIRST: MOVAH,0 MOVAL,3 INT10H MOVDX,OFFSETPROMPT MOVAH,9 INT21H MOVSI,0NEXT: MOVDX,SADDR[si] MOVAH,09H INT21H MOVCOUNT,0 MOVSEC,0 MOVMIN,0 MOVHOURS,0 STIFOREVER: CALLKBGET TESTKBFLAG,80H JNZENDINT PUSHAX CALLDISPCHAR POPAX CMPAL,0DH JNZFOREVER MOVAL,0AH CALLDISPCHAR CALLDISPTIME LEADX,CRLF MOVAH,09H INT21H ADDSI,2 CMPSI,5*2 JNENEXT JMPFIRST ENDINT: CLI PUSHDS MOVDX,SAVE_LC MOVAX,SAVE_LC+2 MOVDS,AX MOVAL,1CH MOVAH,25H INT21H POPDS PUSHDS MOVDX,OLDIP9 MOVAX,OLDCS9 MOVDS,AX MOVAL,09H MOVAH,25H INT21H POPDS STI RETMAINENDP CLINTPROCNEAR PUSHDS MOVBX,DATA MOVDS,BX LEABX,COUNT INCWORDPTR[BX] CMPWORDPTR[BX],18 JNERETURN CALLINCTADJ: CMPHOURS,12 JLERETURN SUBHOURS,12RETURN: POPDS STI IRETCLINTENDPINCTPROCNEAR MOVWORDPTR[BX],0 ADDBX,2 INCWORDPTR[BX] CMPWORDPTR[BX],60 JNEEXIT CALLINCTEXIT: RETINCTENDPDISPTIMEPROCNEAR MOVAX,MIN CALLBINDEC MOVBX,0 MOVAL,':' MOVAH,0EH INT10H MOVAX,SEC CALLBINDEC MOVBX,0 MOVAL,':' MOVAH,0EH INT10H MOVBX,COUNT MOVAL,55D MULBL CALLBINDEC RETDISPTIMEENDPBINDECPROCNEAR MOVCX,100D CALLDECDIV MOVCX,10D CALLDECDIV MOVCX,1 CALLDECDIV RETBINDECENDPDECDIVPROCNEAR MOVDX,0 DIVCX MOVBX,0 ADDAL,30H MOVAH,0EH INT10H MOVAX,DX RETDECDIVENDPKBGETPROCNEAR PUSHBX CLI MOVBX,BUFPT1 CMPBX,BUFPT2 JNZKBGET2 CMPKBFLAG,0 JNZKBGET3 STI POPBX JMPKBGETKBGET2: MOVAL,[BUFFER+BX] INCBX CMPBX,16H JCKBGET3 MOVBX,0KBGET3: MOVBUFPT1,BX POPBX RETKBGETENDPKBINTPROCFAR PUSHBX PUSHAX INAL,60H PUSHAX INAL,61H ORAL,80H OUT61H,AL ANDAL,7FH OUT61H,AL POPAX TESTAL,80H JNZKBINT2 MOVBX,OFFSETSCANTAB XLATSCANTAB CMPAL,0 JNZKBINT4 MOVKBFLAG,80H JMPKBINT2KBINT4: MOVBX,BUFPT2 MOV[BUFFER+BX],AL INCBX CMPBX,16H JCKBINT3 MOVBX,0KBINT3: CMPBX,BUFPT1 JZKBINT2 MOVBUFPT2,BXKBINT2: CLI MOVAL,20H OUT20H,AL POPAX POPBX STI IRETKBINTENDPDIS