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zk/Instruction_set_architectures.md
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@ -4,10 +4,9 @@ tags: [CPU]
# instruction set architectures # instruction set architectures
We know that the [ALU](Arithmetic_Logic_Unit.md) is We know that the [ALU](Arithmetic_Logic_Unit.md) is responsible for the
responsible for the "execute" stage of the "execute" stage of the [fetch, decode, execute](Fetch_decode_execute.md) cycle,
[fetch, decode, execute](Fetch_decode_execute.md) implementing the most basic binary operations such as adding two numbers.
cycle, implementing the most basic binary operations such as adding two numbers.
Accross different machines and CPU types there can be differences in how the Accross different machines and CPU types there can be differences in how the
given instruction, say "add", is implemented. Not all computers will execute the given instruction, say "add", is implemented. Not all computers will execute the
@ -29,7 +28,7 @@ introduced by Intel but are also made by AMD.
### x86 ### x86
The name stems from Intel's internal naming conventions - every new processor The name stems from Intel's internal naming conventions - every new processor
they introduced would have numerical designation ending with "86". Later they they introduced would have a letter designation ending with "86". Later they
would adopt names such as "Pentium", "Celeron" etc. Regardless, these processors would adopt names such as "Pentium", "Celeron" etc. Regardless, these processors
still fall under the "x86" family. still fall under the "x86" family.
@ -37,12 +36,12 @@ Over time, new instructions have been added to the x86 architecture but they all
maintain backwards compatibility with preceding generations. maintain backwards compatibility with preceding generations.
There have been different, successive generations of x86 corresponding to their There have been different, successive generations of x86 corresponding to their
[word-size](Signed_and_unsigned_numbers.md): [word-size](Signed_and_unsigned_numbers.md): 16-bit, 32-bit, 64-bit. Word size
16-bit, 32-bit, 64-bit. Word size here just means how many bits the processor here just means how many bits the processor can work with at a time.
can work with at a time.
A 34-bit processor can operate on values that are 32 bits in length. This means A 34-bit processor can operate on values that are 32 bits in length. This means
it has 32bit registers, a 32-bit data bus, a 32-bit address bus and so on. it has 32bit registers, a 32-bit data [[Bus|bus]], a 32-bit address bus and so
on.
AMD introduced the first 64-bit processor, not Intel but they later caught up. A AMD introduced the first 64-bit processor, not Intel but they later caught up. A
64-bit x86 processor is often referred to as _x64_ or _x86-64_. 64-bit x86 processor is often referred to as _x64_ or _x86-64_.

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zk/t6vs.md
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# test

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zk/test_hypen_name.md
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zk/x75l.md
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# Uninstall built package

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zk/y5gl.md
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___
id: y5gl
title: another title
tags: []
created: Sunday, March 10, 2024
___
# another title