Illegal Instruction (Reserved Opcode) - AMD K5 Technical Reference Manual

AMD-K5 Processor Technical Reference Manual
3.3.7

Illegal Instruction (Reserved Opcode)

mnemonic opcode
(none)
Privilege:
Registers Affected:
Flags Affected:
Exceptions Generated: Real, Virtual-8086 mode—Invalid opcode
This opcode always generates an invalid opcode exception. The opcode will not be
used in future AMD K86™ processors.
3-36
description
0FFF Illegal instruction (reserved opcode)
Any level
none
none
Protected mode—Invalid opcode
Protected mode—Invalid opcode
18524C/0—Nov1996
Software Environment and Extensions