Hierarchical structure of computer systems

In general, the hierarchical structure of a computer system is divided into 7 levels

Level 0: Hardware designer Logic Line operation timing

Level 1: Logic Designer Register Logic Micro-Program command timing

Level 2: Machine language Programmer Central Processor instruction system target program

Level 3: System Operator OS System primitive Keyboard command

Level 4: Assembler Assembly programmer

Level 5: Advanced Language programmer Interpreter program compiler

Level 6: Application Language for user applications

Topic:

1, in the computer system structure, the machine language programmer sees the machine attribute is (C). A) computer software to complete the function B) all components of the computer hardware C) programming to use the hardware knowledge D) hardware implementation of computer components

2, to the assembly language programmer Transparent is (A). A) DMA access mode in I/O mode B) floating point arithmetic C) program interrupt D) Access operand

The answer is that B is the CPU of the hardware design decisions, programmers can not understand, C is written by the computer manufacturing company programmer, there is computational BIOS memory, machine language programmers do not understand its internal mechanism, can only be used to invoke, complete a certain function.

Hierarchical structure of computer systems