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

In computing, an opcode (abbreviated from operation code, also known as instruction machine code, instruction code, instruction syllable, instruction parcel...

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...

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...

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...

classify some exceptions not related to access violations, such as illegal opcode exceptions, as general protection faults, even though they have nothing...

TOS to zero and restart the operation. … Illegal opcodes that are instruction holes in the MMX instruction opcode map are defined to generate a one uop assist...

Machine code General concepts Instruction set Opcode Illegal opcode Opcode table Operand Instructions NOP Branch Indirect branch Repeat instruction Execute...

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

Macintosh operating system executes system calls using that processor's illegal opcode exception handling mechanism. Motorola specified that instructions beginning...