Hardware & software that work together to process data and complete tasks.
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What is hardware?
The physical stuff that makes up your computer system, like the CPU, motherboard, monitor & printer.
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What is software?
Software is the programs or applications that a computer system runs e.g Operating system, video game, word processor
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What are embedded systems?
Computers built into other devices e.g dish washers, TVs. Usually dedicated systems.
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What are benefits of embedded systems?
Dedicated to a single task meaning easier to design, cheaper to produce, and more efficient at doing their task than a general purpose computer.
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Name the main hardware components of a computer.
Power Supply, Case cooling fan, CPU heat sink and cooling fan, CPU, graphics carad, motherboard, Hard Disk Drive, RAM, Optical Drive
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What is the CPU?
The brains of the computer. It processes all the data & instructions that make the system work.
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What affects processing power of a CPU?
Clock speed, number of cores & cache size.
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What are the three main parts of the CPU?
Control Unit, Arithmetic Logic Unit, The Cache
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What is the control unit?
Control unit is in overall control of the CPU. Main job is to execute program instructions using fetch-decode-execute cycle. Also, controls flow of data inside the CPU & outside the CPU.
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What is the Arithmetic Logic Unit?
Does all the calculations such as simple addition & subtraction, can do multiplications & divisions using repeated addition & subtraction. Also, performs logic operations (AND, OR, NOT) & binary shifts. Contains accumulator register.
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What is the cache?
Fast memory in CPU. Slower than registers. Stores regularly used data so CPU can access it quickly. CPU checks cache first to see if data is there. If not, checks RAM. Cache is low capacity & expensive compared to RAM.
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What are the different levels of cache memory?
L1, L2, L3. L1 is the quickest but has the lowest capacity. L2 is slower than l1 but can hold more. L3 is slower than L2 but can hold more.
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What are the different registers of a CPU?
Program counter, memory address register (MAR), memory data register(MDR) and accumulator.
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Other cards in this set
Card 2
Front
What is hardware?
Back
The physical stuff that makes up your computer system, like the CPU, motherboard, monitor & printer.
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