HLT -- Halt

Opcode      Instruction        Clocks     Description

F4          HLT                5          Halt

Operation

Enter Halt state;

Description

HALT stops instruction execution and places the 80386 in a HALT state. An enabled interrupt, NMI, or a reset will resume execution. If an interrupt (including NMI) is used to resume execution after HLT, the saved CS:IP (or CS:EIP) value points to the instruction following HLT.

Flags Affected

None

Protected Mode Exceptions

HLT is a privileged instruction; #GP(0) if the current privilege level is not 0

Real Address Mode Exceptions

None

Virtual 8086 Mode Exceptions

#GP(0); HLT is a privileged instruction

up: Chapter 17 -- 80386 Instruction Set
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