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# March 11, 2024

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- An assembly instruction is a _mneumonic_ that comprises an "op code" plus
operands
- It is translated back to machine code by an assembler for the computer to
execute.
## Detail
### Example instruction
@ -30,12 +33,20 @@ machine code. Therefore you need an **assembler** to translate the assembly code
to machine code. An assembly language text file is fed into an assembler and a
binary object file containing machine code is returned.
## Relation to instruction set architectures
A disassembler does the opposite: translate machine code into assembly.
### Relation to instruction set architectures
- the ISA defines the hardware capabilities and the instructions that can be run
on the hardware
- machine code is a binary representation of these instructions and can be
directly executed by the CPU
- humans use an assembly language version of the machine code which is then
translated back to machine code for the computer to execute.
## Applications
## Related notes
[[Hexadecimal_number_system]], [[Instruction_set_architectures]]
Summary, My Insight, Applications, Related Not
[[Hexadecimal_number_system]], [[Instruction_set_architectures]],
[[CPU_architecture]]