Computer Orgaization & Operatiing System

1. Hierarchical nature of complex system is essential to both their design and their description

2. Structure

2.1. The way in which components relate to each other

3. Function

3.1. The operation of individual components as part of the structure

4. Basic function of computer

4.1. Data processing

4.2. Data storage

4.3. Data movement

4.4. Control

5. IBM System 370 Architecture

5.1. introduced in 1970

5.2. included a number of models

5.3. could upgrade to more expensive, faster model

6. Hierarchical system

6.1. set of interrelated subsystems

7. Structure of computer

7.1. Computer

7.1.1. I/O

7.1.2. System Bus

7.1.3. Main memory

7.1.4. CPU

7.1.4.1. Register - provides storage internal to the CPU

7.1.4.2. ALU - performs the computer's data processing function

7.1.4.3. Internal Bus

7.1.4.4. Control Unit - control the operation of the CPU and hence the computer

7.1.4.4.1. Sequencing Logic

7.1.4.4.2. Control Unit Register and Decoders

7.1.4.4.3. Control Memory

7.1.4.5. CPU Interconnection - Some mechanism that provides for communication among the control unit, ALU and registers

7.2. CPU - controls the operation of the computer and performs its data processing funtions

7.3. Main memory - stores data

7.4. I/O - moves data between the computer and its external environment

7.5. System Interconnection - some mechanism that provides for communication among CPU, main memory, and I/O

7.6. Main memory - stores data