![]() Machine code is a strictly numerical language, and is the lowest-level interface to the CPU intended for a programmer. ![]() x86, ARM) has its own ISA, and hence its own specific machine code language. In general, each architecture family (e.g. This acts as an abstraction layer, enabling compatibility within the same family of CPUs, so that machine code written or generated according to the ISA for the family will run on all CPUs in the family, including future CPUs. The notion of an instruction set architecture (ISA) defines and specifies the behavior and encoding in memory of the instruction set of the system, without specifying its exact implementation. A program in machine code consists of a sequence of machine instructions (possibly interspersed with data)." Įach 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.Įarly CPUs had specific machine code that might break backwards compatibility with each new CPU released. Although decimal computers were once common, the contemporary marketplace is dominated by binary computers for those computers, machine code is "the binary representation of a computer program which is actually read and interpreted by the computer. In computer programming, machine code is computer code consisting of machine language instructions, which are used to 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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