From: Clemens Valens <c DOT valens AT mindless DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: How to restart computer?
Organization: http://www.remarq.com: The World's Usenet/Discussions Start Here
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Date: Wed, 04 Aug 1999 04:30:47 -0800
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

You are in luck, I had to do the same and came up with this
code (it works very well):

/*
 * Reboot the PC by simulating a ctrl-alt-del.
 * Based on Frank van Gilluwe's "The Undocumented PC"
 */
int reboot(void)
{
  volatile char kb_status;
  unsigned short int i, timeout = 1;

  while ((kb_status=inportb(0x64))&0x02) {
    i=1; while(i) i++; /* Slow down I/O access. */
    timeout++;
    if (!timeout) goto reboot_error;
  }

  outportb(0x64,0xfe);

  i=1; while(i) i++; /* Slow down I/O access. */

  /*
   * If all went well you should never get below this line.
   */

  while ((kb_status=inportb(0x64))&0x02) {
    i=1; while(i) i++; /* Slow down I/O access. */
    timeout++;
    if (!timeout) goto reboot_error;
  }

  return 0;

reboot_error:
  return -1;
}

I have only tested it with DJGPP, but normally it should
work with BC as well.

Clemens



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