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3-36 Software Environment and Extensions

AMD-K5 Processor Technical Reference Manual 18524C/0—Nov1996

3.3.7 Illegal Instruction (Reserved Opcode)

mnemonic opcode description

(none) 0FFF Illegal instruction (reserved opcode)

Privilege: Any level

Registers Affected: none

Flags Affected: none

Exceptions Generated: Real, Virtual-8086 mode—Invalid opcode

Protected mode—Invalid opcode

This opcode always generates an invalid opcode exception. The opcode will not be

used in future AMD K86™ processors.

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