In dictionaries:
Illegal opcode
An illegal opcode, also called an unimplemented operation, unintended opcode or undocumented instruction, is an instruction to a CPU that is not mentioned in any official documentation released by the CPU's designer or manufacturer, which nevertheless has an effect.
Opcode Systems
Opcode Systems, Inc. was founded in 1985 by Dave Oppenheim and based in and around Palo Alto, California, USA.
Opcode table
An opcode table (also called an opcode matrix) is a visual representation of all opcodes in an instruction set.
more...