In computing, an opcode (abbreviated from operation code) is an enumerated value that specifies the operation to be performed. Opcodes are employed in...

machine code opcodes and operands are replaced with mnemonics and labels. For example, the x86 architecture has available the 0x90 opcode; it is represented...

An opcode table (also called an opcode matrix) is a visual representation of all opcodes in an instruction set. It is arranged such that each axis of...

computing, an opcode prefix is an numeric value that alters the function of a following opcode. On some instruction set architectures multiple opcode prefixes...

Opcode Systems, Inc. was founded in 1985 by Dave Oppenheim and based in and around Palo Alto, California, USA. Opcode produced MIDI sequencing software...

PREFETCHW, opcode 0F 0D /0 as well as opcodes 0F 0D /2../7 are all documented to be performing prefetch. On Intel processors with PREFETCHW, these opcodes are...

uses a mnemonic to represent, e.g., each low-level machine instruction or opcode, each directive, typically also each architectural register, flag, etc....

The Intel BCD opcodes are a set of six x86 instructions that operate with binary-coded decimal numbers. The radix used for the representation of numbers...

Fetching the instruction opcodes from program memory well in advance is known as prefetching and it is served by using a prefetch input queue (PIQ). The...

SIGTRAP. The opcode for INT3 is 0xCC, as opposed to the opcode for INT immediate8, which is 0xCD immediate8. Since the dedicated 0xCC opcode has some desired...

An illegal opcode, also called an unimplemented operation, unintended opcode or undocumented instruction, is an instruction to a CPU that is not mentioned...

and opcode ≠ 0. A fragmented message consists of one frame with FIN = 0 and opcode ≠ 0, followed by zero or more frames with FIN = 0 and opcode = 0,...

initial opcode byte, followed by up to 2 bytes of operands. 1⁄4 of the opcode bytes, x0–x3, are used for irregular opcodes. 3⁄4 of the opcode bytes, x4–xF...

against a remote target machine. Other important sub-projects include the Opcode Database, shellcode archive and related research. The Metasploit Project...

instructions. On the processing architecture, a given instruction may specify: opcode (the instruction to be performed) e.g. add, copy, test any explicit operands:...

called operands, and a code indicating the operation to be performed (opcode); the ALU's output is the result of the performed operation. In many designs...

design flaw was discovered by programmers. Due to incomplete opcode decoding, two illegal opcodes, 0x9D and 0xDD, will cause the program counter on the processor...

the semantics of a few of the opcodes, and SCHIP continued to use those new semantics in addition to changing other opcodes. Many online resources about...

operations based on specific opcodes in the instruction. For example, in RISC-V architecture, funct3 and funct7 opcodes exist to distinguish whether an...

code or opcode for short). The command to add two numbers together would have one opcode; the command to multiply them would have a different opcode, and...

Open Music System (OMS) was a virtual studio management application by Opcode for the Classic Mac OS. Similar to FreeMIDI by Mark of the Unicorn and Audio...

registers. The binary opcodes (machine language) were identical, but preceded by a new opcode prefix. Zilog published the opcodes and related mnemonics...

(immediate), and J (jump). Every instruction starts with a 6-bit opcode. In addition to the opcode, R-type instructions specify three registers, a shift amount...

effects; for example, on the Motorola 68000 series of processors, the NOP opcode causes a synchronization of the pipeline. Listed below are the NOP instruction...

to: STOS BASIC, a programming language for the Atari ST computer stos, an opcode mnemonic in X86 assembly language Secure Trusted Operating System Consortium...

human-readable compared to raw machine code. Each machine code instruction is an opcode which, in assembly is replaced with a mnemonic. Each mnemonic corresponds...

the same on all Art-Net packets, while the green portion is variable. The opcode (given in little endian) tells the recipient this is a packet containing...

The Metasploit Project, for example, maintains a database of suitable opcodes, though it lists only those found in the Windows operating system. A buffer...

with one or more operands to translate into one or more bytes known as an opcode. RISC-V processors feature a set of registers that serve as storage for...

assigned by the program that generates any kind of query. QR - Query/Response. OPCODE - A 4-bit field that specifies the kind of query in this message. This value...