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architecture: create dedicate entry for ALU

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thomasabishop 2023-07-10 11:58:40 +01:00
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Computer_Architecture/CPU/Arithmetic_Logic_Unit.md Normal file
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---
categories:
- Computer Architecture
tags: [CPU]
---
# Arithmetic Logic Unit (ALU)
The ALU is the centerpiece or core of the [CPU](/Computer_Architecture/CPU/CPU_architecture.md) architecture, where the binary calculations occur. It comprises [logic gates](/Electronics_and_Hardware/Digital_circuits/Logic_gates.md) that execute the instructions passed from memory and where the data stored by the registers is acted upon.
It can execute arithmetic and logical operations on binary numbers. This is where you will find operations conducted by [full-adders and half adders](/Electronics_and_Hardware/Digital_circuits/Half_adder_and_full_adder.md) etc.
This is the heart of the CPU; all the other components on the CPU chip are appendanges to the execution that occures within the ALU. It is also what is meant by the **core** processor that is referred to in hardware specs of computers, for instance _dual-core_, _quad core_ etc.
Below is a schematic of a series of logical circuits within the CPU core:
![74181aluschematic.png](/_img/74181aluschematic.png)

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Computer_Architecture/CPU/CPU_architecture.md
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## Arithmetic Logic Unit ## Arithmetic Logic Unit
This is the hub of the CPU, where the binary calculations occur. It comprises [logic gates](/Electronics_and_Hardware/Digital_circuits/Logic_gates.md) that execute the instructions passed from memory. This is where the data stored by the registers is acted upon. See [Arithmetic Logic Unit](/Computer_Architecture/CPU/Arithmetic_Logic_Unit.md)
It can execute arithmetic on binary numbers and logical operations. This is where you will find operations conducted by adders and half-adders etc.
This is the heart of the CPU; all the other components on the CPU chip are appendanges to the execution that occures within the ALU. It is also what is meant by the **core** processor that is referred to in hardware specs of computers, for instance _dual-core_, _quad core_ etc.
Below is a schematic of a series of logical circuits within the CPU core:
![74181aluschematic.png](/_img/74181aluschematic.png)
### Processor cores ### Processor cores