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Miloslav Ciz 2023-05-08 15:05:15 +02:00
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abstraction.md
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@ -8,7 +8,7 @@ In a more detailed view abstraction is not one-dimensional, we may abstract in d
Let's take a look at a possible division of a [computer](computer.md) to different levels of abstraction, from lowest to highest (keep in mind it's also possible to define the individual levels differently):
- **[physics](physics.md)**: Computer is collection of atoms and subatomic particles such as electrons, operating with terms such as [energy](energy.md), charge, spin or quantum effects.
- **[physics](physics.md)**: Computer is a collection of atoms and subatomic particles such as electrons, operating with terms such as [energy](energy.md), charge, spin or quantum effects.
- **[electronic](electronics.md) circuit**: Computer is an [analog](analog.md) circuit in which electricity flows through wires and electronic components, operating with terms such as [voltage](voltage.md), [current](current.md), [transistor](transistor.md), resistor or electronic interference.
- **[logic circuit](logic_gate.md)**: Computer is a [binary](binary.md) [digital](digital.md) circuit; this is abstracting electricity away, now we are only considering two possible values carried by the wires: 1s and 0s. Operating with terms such as [logic gate](logic_gate.md), logic function, [multiplexer](multiplexer.md) or sequential circuit.
- **[machine code](machine_code.md)/[assembly](assembly.md)**: Computer is a machine with a specific [instruction architecture](isa.md), executing an [algorithm](algorithm.md) encoded as simple binary instructions, such as "add two numbers" or "write a number to memory", in a specific format that's different for different types of computers. Operating with terms such as CPU cycle, [opcode](opcode.md), [register](register.md), memory or [interrupt](interrupt.md).