Hardware and communication

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Central Processing Unit
Processes basic instructions that run a computer
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Arithmetic Logic Unit
Performs specified calculations from the instruction
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Control Unit
Controls the behaviour of other components via control signals
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Register
A small set of data holding places that are part of a computer processor
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Memory Data
Contains most recent data item
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Memory Access
Contains address of next part of memory to be accessed
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Instruction
Contains current instruction
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Accumulator
Performs intermediate results of calculation
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Bit
Binary digit
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Byte
8 bits; store single character of information
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Word
The longer the word length, the more the processor can do
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Data Bus
Transfers data from memory to processor
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Address Bus
Specifies a physical address in memory
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RAM
Temporarily stores current program data
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ROM
Stores bootstrap program for starting up the computer
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RAM
Volatile
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ROM
Non-volatile
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Cache
For regularly used instructions or data. Extremely fast
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Input
Introduce data to a computer
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Output
Produce input data in a humanly intelligible form
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Interfacing
Communication between devices with drivers
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Handshaking
Check if both devices are ready to send/receive signals
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Network
Number of wirelessly interconnected computers, allowing for communication and sharing of resources
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Bus Topology
Cost effective (minimal cabling), easy to add new devices to the network. Network is degraded when too many devices are being used, a break in the backbone disrupts the network
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Ring topology
Not dependant on a central hub, shared access means all devices have the same network speed. A break in the cable disrupts the network, fault detection is difficult, impossible to keep network running while adding more devices
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Star topology
Ig one cable fails the other devices will still operate, more devices can be added easily without disrupting the network. Higher costs due to more cabling, dependence on central hub; if this fails the entire network will not operate
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Other cards in this set

Card 2

Front

Performs specified calculations from the instruction

Back

Arithmetic Logic Unit

Card 3

Front

Controls the behaviour of other components via control signals

Back

Preview of the back of card 3

Card 4

Front

A small set of data holding places that are part of a computer processor

Back

Preview of the back of card 4

Card 5

Front

Contains most recent data item

Back

Preview of the back of card 5
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