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J277Computer science Paper 1 - Coggle Diagram
J277Computer science Paper 1
Topic 1.1 Systems architecture
Von Neuman Architecture
The Von Neuman architecture is the development of being able to store instruction and program data in the same memory in binary form
CPU Components and their function
The three main components in the cpu are Memory, Control Unit and the Arithmetic logic unit
Memory: There are 4 memory registers the Memory Address Register, Memory Data register, Program Counter and the Accumulator
The Control Unit: The control unit co-ordinates all of the activities in the CPU
The Arithmetic Logic Unit: The ALU carries out calculations and logical decisions
Binary
Computers are switches. 0 and 1s only. Denary is also known as base 10. We count in tens because we have ten fingers
Purpose of the CPU
The purpose of the cpu is the fetch execute cycle (FDE Cycle)
CPU performance.
The common characteristics of CPUs that affect the performance is the clock speed, cache size and the number of cores
Clock speed is measured in Hertz which means the number of cycles per second. The faster the clock the more cycles per second.
Embedded Systems
An embedded system is a computer that is built into another piece of equipment designed to have a specific function. Most electronic devices will contain a microprocessor that can be considered as an embedded system.
Topic 1.2 Memory and Storage
Topic 1.3 Networking
Topic 1.4 Systems security
Topic 1.5 Systems software
Topic 1.6 Legal, Ethical and Environmental Considerations