中斷程序設計

中斷程序設計匯編語言實驗報告AssemblyLanguageProgrammingLab

Reports______________________________________________________________________________班級：姓名學號：實驗日期：學院：專業(yè)：實驗順序：原創(chuàng)：___實驗名稱：中斷程序設計實驗分數(shù)：_______考評日期:________指導教師：______________________________________________________________________________實驗目的掌握中斷的類型，軟件中斷和硬件終端。掌握中斷處理的過程，理解中斷類型，中斷向量。掌握系系統(tǒng)中斷以及功能調(diào)用?？梢宰约涸O計中斷程序______________________________________________________________________________實驗環(huán)境操作系統(tǒng)：windows8編譯程序：masm5.0_________________________________________m2:movdl,0dhmovah,2int21hmovdl,0ahint21hmovdx,offsetmess2movax,segmess2movds,axmovah,9hint21hnext:mainendpmynameprocfarstimovdl,0dhmovah,2int21hmovdl,0ahint21hmovcx,10bef:movdl,'*'movah,2int21hloopbefmovax,segmess3movax,dsmovdx,offsetmess3movah,9int21hmovcx,10aft:movdl,'*'movah,2int21hloopaftcliiretmynameendpendstart2，對原有的中斷進行修改.modelsmall.stack.codemess1db0ah,0dh,'enterinterrupt!',0ah,0dh,'$'mess2db0ah,0dh,'exitinterrupt!$'mess3db0ah,0dh,'ContinueorQuit(c/q)?$';主程序mainprocfarstart:movax,@code movds,ax;中斷設置;取出原中斷向量moval,0movah,35h ;取出原來的0號中斷向量 int21h ;放在ES:BX中pushes ;入棧保存pushbxpushds;設置新的中斷向量 ;相當于25h號功能movdx,offsetshowerr ;獲得子程序偏移地址movax,segshowerr ;獲得子程序段地址movds,axmovax,0 moves,ax ;0段，向量表movbx,0 ;現(xiàn)在的0號movcl,2shlbx,cl movwordptres:[bx],dx ;中斷向量放入中斷向量表中movwordptres:[bx+2],ds;應用部分conti:movdx,offsetmess1 ;顯示提示1movah,9int21hint0 ;觸發(fā)0號中斷movdx,offsetmess2 ;顯示提示2movah,9int21hmovax,15 movbl,0idivbl ;除0,觸發(fā)0號中斷movdx,offsetmess3 ;顯示提示3movah,9int21hmovah,1 ;輸入選擇int21hcmpal,'c'jecontiquit:popds ;彈出保存的數(shù)據(jù)popbx popesmoval,0 ;恢復原來的0號movah,25h ;中斷向量放入中斷向量表中int21hmovax,4c00h ;返回DOSint21hmainendp;中斷子程序showerrprocnearshowbegin:jmpshortshow_str ;跳過數(shù)據(jù)定義a1db'Attention!error...' ;顯示信息與子程序放在一起，便于以后駐留a2db0show_str: movax,@code ;數(shù)據(jù)段與代碼段同段 movds,axsti ;開中斷movdh,22 ;行movdl,24 ;列movbl,1 ;屬性movsi,offseta1movax,0b800h ;顯存首址moves,axmovax,160 muldh ;行號*160movdi,ax ;起始行位置saldl,1movdh,0adddi,dx ;+列號movcx,a2-a1 ;字符串長度let1: ;循環(huán)寫字符和屬性到顯存moval,[si] moves:[di],almovbyteptres:[di+1],blincsiincbl ;改變屬性adddi,2looplet1 ;寫