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