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<h2>22.26 Rebooting the PC from a DJGPP program</h2>

<p><em><strong>Q</strong>: How can I reboot the PC from a DJGPP program?</em>

<br><p>
<p><strong>A</strong>:  There are several possible ways to achieve this:

<ul>
<li>In plain DOS, have your code call the INT 19h handler via
<code>__dpmi_int</code> instruction.  (Emitting the literal <code>INT 19h</code>
instruction won't work with CWSDPMI, because CWSDPMI deliberately blocks
it; version r5 of CWSDPMI might remove this restriction.)

<li>On Windows, emitting the literal <code>INT 19h</code> instruction is a better
alternative, since Windows misbehaves when INT 19h is issued via
<code>__dpmi_int</code>.

<li>Send the <code>FEh</code> command to the port 64h:

<pre> outportb (0x64, 0xfe);
</pre>

<p>(this should be preceded by a test whether the keyboard buffer is full;
because then the keyboard will ignore the command; however,
keyboard-full is a very rare condition). 
</ul>

<p><hr>
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