For this reason, programs are very rarely written directly in machine code in modern contexts, but may be done for low level debugging, program patching (especially when assembler source is not available) and assembly language disassembly. While it is possible to write programs directly in machine code, managing individual bits and calculating numerical addresses and constants manually is tedious and error-prone.
Machine code is a strictly numerical language which is intended to run as fast as possible, and it may be regarded as the lowest-level representation of a compiled or assembled computer program or as a primitive and hardware-dependent programming language.
Each instruction causes the CPU to perform a very specific task, such as a load, a store, a jump, or an arithmetic logic unit (ALU) operation on one or more units of data in the CPU's registers or memory. In computer programming, machine code, consisting of machine language instructions, is a low-level programming language used to directly control a computer's central processing unit (CPU).
Machine language monitor in a W65C816S single-board computer, displaying code disassembly, as well as processor register and memory dumps.
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