1.1.2 Types of Processor
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What does RISC stand for?
Reduced Instruction Set Computer
What does CISC stand for?
Complex Instruction Set Computer
What are the properties of RISC processors?
Small instruction set Each instruction is one line of machine code Used in everyday devices
What are the properties of CISC processors?
Large instruction set Instructions are built into hardware Used in embedded systems and microprocessors
What are the advantages of RISC processors?
Simpler instructions Simpler to decode Faster Execution Lower power consumption Supports pipelining
What are the disadvantages of RISC processors?
More instructions required Increased memory usage Higher cost (more general-purpose registers)
What are the advantages of CISC processors?
Reduce code size More memory instructions (fewer instructions) Widely used so larger user base & more available software
What are the disadvantages of CISC processor?
Slower execution More complex design Higher power consumption
What is a graphics processing unit?
A co-processor made up of lots of independent parallel processors
What are GPUs used for?
Image processing and machine learning
What are multi-core systems?
Systems of multiple cores completing separate FDE cycles
What are parallel systems?
Systems in which multiple instructions can be completed simultaneously Doesn’t require multiple cores, can use threading & pipelining