Section 7 Flashcards
What is a processor in a computer?
A device that carries out instructions and memory management.
What does a processor do in a pc?
A processor controls the memory management and it also carries out computation on data by following instructions.
What does main memory do?
Main memory stores data and it instructions that will be used by the processor.
What is RAM
RAM (random access memory) is volatile memory that can be stored very quickly, this means that certain applications can run quickly. However when the power is turned off the ram looses all of its content.
What is ROM
ROM (read only memory) is a method of storing data and instructions. But it is mainly used for the start up if a computer.
What is addressable memory?
Addressable memory is made up of millions of addressable cells and various instructions that make up a program. This memory is organised via the address.
What are the three types of buses?
Data, Address, control
What does the data bus do?
Transfers data between the processer and memory. It also transfers data from the I/O controllers.
What is the address bus?
It is used to specify a physical address in memory so that the data bus can access it.
What is the control bus?
The control bus controls the flow of data between the processor and other parts of the computer.
What are I/O controllers
These are the direct link between the processor and the main memory. They send and receive instructions. Basic I/O devices are keyboard and mouse.
