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[单选题]
中断处理程序如何将栈顶的内容弹出到IP,CS,FLAGS，返回断点（ ）
A
硬件自动完成b.使用RET指令c.使用POP指令d.使用IRET指令
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参考答案
试题答案：
D
答案解释：
中断处理程序需要在程序的最后一条使用IRET指令，将栈顶的内容依次弹出到IP,CS,FLAGS，返回断点，恢复主程序的执行。
相关题目
8255A作为8位数字显示器接口如题38(a)图所示,并给出了8255A的方式选择控制字格式如题38(b)图所示,8255A的口地址已设定为320H~323H,使位5的数字显示器显示字符A的程序段如下所示,请将程序空缺处的正确内容①~⑥填写在答题卡上。 MOV DX,___①__；初始化MOV AL,___②__OUT DX,ALMOV DX,__③__；输出字形码MOV AL,__④___OUT DX,ALMOV DX,___⑤__；输出位选码MOV AL,__⑥___OUT DX,AL
8259A内部用来记忆正在处理中的中断级别的寄存器是（）
一片8259A可管理_________优先权中断源，一片8259A主片和一片8259A从片级联后最多可管理_________优先权中断源。
在寻址方式中我们经常会提到有效地址EA的概念,请说出有效地址与物理地址的区别和联系。
CPU对8253进行读操作时读到的是（ ）
关于异步串行通信中每帧信息的停止位，下列选项中描述不正确的是（ ）
8259A的哪些寄存器内容可由程序设定（ ）
执行以下指令段后，AX等于（）
8086系统中I/O端口可采用I/O端口独立编址方式的原因是( )A.8086有专用的IN指令和OUT指令B.8086有MOV指令C.8086CPU有控制信号D.8086CPU有控制信号E.8086CPU有控制信号WR和RD
（）引脚为可屏蔽中断申请输入线。
热门试题
1.
28．设关系模式R(A，B，C，D，E，G)上的函数依赖集F={D→G，C→A,CD→E,A→B}，那么分解={DG,AC,CDE,AB}是无损分解吗？为什么？
2.
3.
20.下列选项中，不属于系统分析文档包含内容的是
4.
22.2 Which of the following is TRUE?(2分)
5.
21. There is no doubt that new technologies will also play an important role in language teaching in the twenty-first century. Indeed, the use of technology in foreign language learning has constituted another important revolutionary movement in our discipline (学科）in the last half of the twentieth century. Although it has clearly not been a methodological revolution，technological innovation has played an important role in the recent history of language teaching and is bound to have a profound effect on the way that languages are taught in the future. Beginning with the introduction of filmstrips, audiotapes, and language labs in “direct method” and “audiolingual” classroom over forty years ago, technological innovation has moved from the increased use of cassette tapes, videotapes, and overhead projectors and cameras in the past several decades to the introduction of CD-ROMs and the Internet in the 1990s. The possibilities for computer-enhanced language teaching have most recently been explored in distance education programs as well as in the use of local area networks, computer-assisted reading programs, and web-based classroom activities.Though the use of technology is nothing new in foreign language teaching, its exact role in the curriculum is still being assessed and questioned, particularly in light of the rapidly changing nature of technological aids to instruction. Rather than seeing technology as just another ancillary (助手） to be added to our teaching devices, we need to evaluate its potential for enhancing classroom learning as well as for facilitating (使……便利）student-centered, independent learning outside the classroom. In using technological aids and computer-mediated (计算机为中介的）materials in instruction, we also need to bear in mind the level of proficiency of our students and their ability to benefit from the materials that can be used for them. The use of authentic materials is going to be discussed in more detail in a later section of this chapter and in subsequent chapters.(10分)21.1 This passage is mainly about____.(2分)A. the role technology plays in foreign language learningB. the role technology plays in foreign language teachingC. the role computer plays in language learning and language teachingD. the role technology plays in foreign language learning and teaching
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