Outline
- Chapter Organization courses
- We need to remember a few words
- 1. The main indicator of advances in computer technology program on behalf of
- 2. A computer is a modern information processing tools.
- 3. The computer system
- The composition of the computer system
- Von Neumann architecture (hardware)
- Computer works
- The reason for using binary-coded
Chapter Organization courses
We need to remember a few words
1. The main indicator of advances in computer technology program on behalf of
The main indicator of advances in computer technology program on behalf of: components updated
2. A computer is a modern information processing tools.
More specifically, a computer capable of processing digital information of a general-purpose high-speed operation of the automatic apparatus.
3. The computer system
The computer system as a whole, including computer hardware and software, the two inseparable, but at different levels. No computer software "bare metal" can not play any role, equal only person body, not the soul the same. The hardware is the physical infrastructure software, because of the height of the progress of the hardware was the stage for the development of software.
The composition of the computer system
Note:
the CPU operator + = Controller
Host + = the CPU main memory
external device (other than the host hardware) + = output input device auxiliary storage device +
Von Neumann architecture (hardware)
input device
The programs and data can be identified by the machine and accept information into the computer form. (Keyboard, mouse, scanner, camera)
Output Device
The results of the computer process output information in the form of people or other acceptable form required by the system. (Display, printer)
Operator
a. performs arithmetic and logical operations of the member, the operation data can be removed from the memory in a binary format or from the input device, computation results or written to the memory, or output via an output device.
b Arithmetic operation: addition, subtraction (= 1 1 + 2)
logical operations: AND, OR, NOT, XOR, compare, shift (1 = 1 + 1)
C is the core operator: the ALU (arithmetic logic unit ) D
contains the general purpose registers: an accumulator (ACC), multiplied by the quotient register (MQ),
the operand register (X), index register (IX), the base register (BR), a program status register (PSW)
Controller
Coordination of normal operation of the computer system. Means including an instruction register, an instruction decoder, the timing controller
Memory
a. storing data and a program section, which is connected to other components via address and data lines.
b main memory: memory for the CPU can be accessed directly.
Auxiliary memory: to help save more main memory information.
Computer works
a. The programs and data loaded into the main memory
b. From the starting address of the program to run the program
. fetched from memory with a first address c of the first instruction of the program through the control computer to run concurrently decoding step and other features
The reason for using binary-coded
a. binary only two basic states. Use has two stable states can represent a physical device each bit binary number, and producing two stable states for producing a plurality of physical device than the steady state than a physical device easier.
B. binary coding, calculation and operation rules are simple, the switch circuit can be used to achieve, easy.
