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1.1 The characteristics of contemporary processors, input, output and…
1.1 The characteristics of contemporary processors, input, output and storage devices
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1.1.2 Types of processor
CISC: Does the loading, multiplication and storing in one instruction. Uses little RAM but specialised instructons have to be built into the hardware
RISC: Simple instructions each taking one clock cycle. More work to translate, more RAM and allows for pipelining RISC has largely replaced CISC but is still used in embedded systems.
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Parallel processing just refers to a program running more than 1 part simultaneously. Multicore processing means code working on more than one "core" of a single CPU chip.
1.1.3 Input, output and storage
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Read Only Memory (ROM): Is non-volatile, It stores the BIOS & boot up instructions for the computer.
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Magnetic Storage: It is fast & cheap per GB. However it is not durable or portable as it has moving parts.
Optical Storage: Cheap to manufacture and portable, but has a small amount of storage.
Flash Storage: Faster than magnetic storage, it is portable and consumes less power. However it is expensive per GB and has less capacity.
Input / Output devices.
Printers
Inkjet: Works by spraying ink dots onto paper. Dot-Matrix: Pins that strike the paper in order to form an image. 3D-printers Used to print out 3D Objects.