February 9 learning log

Today learned about the history and hierarchy and computer performance computer, the computer also includes how to calculate capacity and speed, probably finishing reads as follows:

Computer development 03

1. Classification and direction of development of the computer

1.1  Electronic computer simulation (continuous)

1.2  electronic digital computer (discrete)

1.2.1 General machine

  Mainframe, minicomputer, microcomputer, etc.

1.2.2 Special Purpose Machine

1.3  instruction and data stream

1. Single instruction stream & single data stream (SISD): von Neumann architecture
2. Single instruction stream & multiple data stream (SIMD): array processor, a vector processor
3. Multiple Instruction & single data stream (MISD): practically non-existent
4. Multiple Instruction & Multiple Data stream (MIMD): multiple processors, multiple data streams
5. Direction of development

Polarization

Computer hierarchy 01

1. Von . Neumann computer

1.1  storage instructions

The instruction code in the form of previously entered into the computer, in accordance with a first command execution program in its memory, the first address after the program in a predetermined order to execute other instructions, until the end of the program.

 

1.2 Features

         The computer hardware system by the arithmetic unit, a memory, a controller, input devices, output devices 5 major components.

 

         Instructions and data stored in memory equal status, and can search by address.

        The instructions and data are represented by binary code

      

Instruction by the operation code and address code composed of operation code to indicate the nature of the operation, the address operand code which indicates a location in memory.

 

      Instructions stored in the memory according to the order of 'the order of instruction is executed normally, or can change the order of execution according to the conditions set in accordance with the result of operation under certain conditions.

   

      Early Von . Neumann architecture center operator to input and output devices through the data transfer operation and a memory.

 

 

 

 

 

 

        

 

Computer hierarchy 02

 

 

 

Computer hierarchy 03

Computer hierarchy 04

 

 

 

 

Computer Performance

And calculating the capacity and speed

The first chapter System Overview