Binary in Computer Systems
Computer Science: Cambridge International GCSE, topic 1.1.9
Binary in Computer Systems
A register is a collection of bits that is often represented in a grid. Each bit in the register will control a different part of the system.
Registers
- Registers use the binary counting system to tell a system to turn 'on' or 'off'.
- 1 means 'on' and 0 means 'off'.
- Each bit in the register controls a different part of the system.
- An 8-bit register is shown.
Using registers
- Registers are used in a wide array of applications, such as:
- Robotic control systems.
- Digital instruments.
- Computer memory systems.
Example - factory security
- If a microprocessor controls a factory security system, the register could be set up as shown.
- In this state, the factory light would be triggered 'on', the factory camera would be triggered 'on', the alarm would be triggered 'on', the notification would be sent, and the police would be autocalled.
- When the control system receives a different register, adjusting the bits in the register changes the state of each part.
Test yourself on Binary in Computer Systems
The 8-bit register shown is used to control a car park's security system
Which register would turn the car park's lights and cameras on, sound the alarm and lock the exit gate?
Applications of Binary Registers