06: Invalid Opcode Fault
This error is returned if any one of the following conditions exists:
The processor tries to decode a bit pattern that does not correspond to any
legal computer instruction.
The processor attempts to execute an instruction that contains invalid
operands.
The processor attempts to execute a protected-mode instruction while running
in virtual 8086 mode.
The processor tries to execute a LOCK prefix with an instruction that cannot
be locked.
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