Tuesday, September 16, 2014

Chapter 4: Security Architecture and Design - Computer Architecture

A computer architecture are all parts of a computer system that make it functional, including all hardware, software, and interfaces. The components that make up a computer are below, and this will be helpful since I am not all that familiar with what the hardware actually does in a computer

CPU (Central Processing Unit) - fetches instructions form memory and processes these instructions

ALU (Arithmetic Logic Unit - where the actual execution takes place.

Control Unit - Manages the system while multiple processes are taking place.

General Register - Holds variables and temporary results as the ALU is working.

Program Counter - Contains the address of the instructions to be fetched next.

Special Register - Holds PSW, counters, and stack pointers.

PSW - Holds conditions and determines whether the computer should be in user mode or privilege mode.

Address Bus - connection between RAM chips and I/O devices.

Data Bus - Used to transmit data during processes.






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