👉 In the context of computer science, a preassembly is a type of assembly language instruction that performs a specific operation before the execution of an instruction. It is often used to perform calculations or operations on data that are not directly part of the machine code. For example: ``` 01h: add $a, $b 02h: sub $c, $d ``` In this example, "add" and "sub" are preassemblies that