2. Arithmetic and logic unit. The part of a computer’s processor that executes instructions.
3. Binary. A base 2 number system that uses values 0 and 1.
4. Bit. A binary digit.
5. Byte. Eight bits.On many computer systems, the smallest addressable unit of main memory.
6. Clock. A device tht generates the regular electronic pulses that drive a computer.
7. Execution time, or E-time. The time during which an instruction is executed by the arithmetic and logic unit.
8. Fetch. To locate a unit of data or an instruction in main memory and send it, over a bus, to the processor.
9. Instruction. One step in a program. Each instruction tells the computer to peform one of its basic functions.
10. Instruction control unit. The part of a computer’s processor that decides which instruction will be executed next.
11. Instruction set. The electronic circuits that add, subract, multiply, divide, copy, compare, request input, and request output. On most computers, these are the circuits that make up the arithmetic and logic unit.
12. Instruction time, or I – time. The time during which the next instruction is fetched from main memory and interpreted by the processor’s instruction control unit.
13. Integrated circuit memory. Memory composed of integrated circuit chips.
14. Machine cycle. The basic operating cycle of a processor during which a single instruction is fetched, interpreted, and executed.
15. Main memory,or Main storage. Memory that can be directly accessed by the processor.
16. Main processor. On a multiprocessing computer , the primary processor. Sometimes used as a synonym for Processor.
17. Operand. The portion of an instruction that specifies the registers and / or memory locations that are to participate in the operation.
18. Operation code. The portion of an instruction that specifies the operation to be performed; e.g. , add, subtract, etc.
19. Processor. The component of a computer that selects and executes instructions. The processor contains a clock, an instruction control unit, an arithmetic and logic unit, and registers.
20. RAM (random access memeory). Memory that can be directly addressed, read, and written by the programme. The main memory of a computer is generally RAM . Contrast with ROM.
21. Register. Temporary storage used to hold data, instructions, or control information in the processor. Often , the current instruction, the data being manipulated by that instruction, and key control information are stored in registers.
22. ROM (read – only memory). A type of memory that cannot be modified by the programmer.
23. Word. The basic storage unit around which a computer system is designed. On all but the smallest microcomputers, a word consists of two or more bytes.
3。二进制的。一个基地2数字系统,使用价值的0和1。
4。一点。一个二进制数字。
5。字节。8比特在许多计算机系统的最小可寻址单元中,主要的记忆。
6。光阴一去不复返。一台设备尺寸的定期电子脉冲产生驱动计算机。
7。执行时间,或者“壹时通”。的时间,期间指令执行算术和逻辑单元。 8。取。定位的数据和指令将主存储器中,在一辆巴士,处理器。
9。指导。在程序的第一步。每条指令告诉计算机peform其基本功能。 10。指令控制器。这个部分计算机的处理器,它决定哪个指令将被处死。
11分。指令集。这个电子电路增加,subract,乘、除、复制、比较,并请求,要求输入输出。在大多数计算机,这些电路组成的算术和逻辑单元。
12。教学时间,或者是我的时间。在接下来的时间从主存储器中取出指令和解释的处理器的指令控制器。
13。集成电路的记忆。集成电路芯片组成的记忆。
14。机器周期。基本操作周期的处理器在一个单独的指令是拿来,解释和执行。
15。主要的记忆,或主存储器中。记忆可以直接访问的处理器。
16岁。主要处理器。在一个多处理计算机,主要的处理器。有时的同义词。 17。操作数。这个部分的指令,指定寄存器和/或内存位置,参与操作。
18岁。运行代码。这个部分的指令指定将要进行的手术;例如,加法,减法,等等。
19。处理器。组件的计算机选择并执行指令。处理器包含一个时钟,一条指令控制单元,一个算术和逻辑单元,并登记。
20。随机存取内存(memeory)。记忆可以直接寻址、读、写的程序。主存储器的一个计算机通常是内存。对照罗。
21。登记。临时存储数据,用来指示,或控制信息的处理。通常,当前的指令、数据操纵,关键控制指令,而信息被存储在寄存器。
22。罗(只读存储器)。这一类型的记忆,是不能被程序员。
23。字。周围的基本存储单元的计算机系统设计与实现。在所有,但最小的微型计算机,由两个或多个字节。
