i386/i386.reference/HLT.htm

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   4 <TITLE>80386 Programmer's Reference Manual -- Opcode HLT</TITLE>
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   8 Chapter 17 -- 80386 Instruction Set</A><BR>
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  14 <H1>HLT -- Halt</H1>
  15
  16 <PRE>
  17 Opcode      Instruction        Clocks     Description
  18
  19 F4          HLT                5          Halt
  20 </PRE>
  21
  22 <H2>Operation</H2>
  23
  24 Enter Halt state;
  25
  26 <H2>Description</H2>
  27
  28 HALT stops instruction execution and places the 80386 in a HALT state.
  29 An enabled interrupt, NMI, or a reset will resume execution. If an
  30 interrupt (including NMI) is used to resume execution after HLT, the saved
  31 CS:IP (or CS:EIP) value points to the instruction following HLT.
  32
  33 <H2>Flags Affected</H2>
  34
  35 None
  36
  37 <H2>Protected Mode Exceptions</H2>
  38
  39 HLT is a privileged instruction; #GP(0) if the current privilege level is
  40 not 0
  41
  42 <H2>Real Address Mode Exceptions</H2>
  43
  44 None
  45
  46 <H2>Virtual 8086 Mode Exceptions</H2>
  47
  48 #GP(0); HLT is a privileged instruction
  49
  50
  51 <P>
  52 <HR>
  53 <P>
  54 <B>up:</B> <A HREF="c17.htm">
  55 Chapter 17 -- 80386 Instruction Set</A><BR>
  56 <B>prev:</B><A HREF="ENTER.htm"> ENTER Make Stack Frame for Procedure Parameters</A><BR>
  57 <B>next:</B><A HREF="IDIV.htm"> IDIV Signed Divide</A>
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