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From: iisakkil@vipunen.hut.fi (Mika R Iisakkila)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: Program needed (how about warm boot?)
Message-ID: <IISAKKIL.91Jun4222716@vipunen.hut.fi>
Date: 4 Jun 91 20:27:16 GMT
References: <1991Jun3.155821.10694@mcs.kent.edu> <Zu0y33w164w@halcyon.uucp>
	<1991Jun3.214720.2154@agora.rain.com>
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In-Reply-To: rickc@agora.rain.com's message of 3 Jun 91 21:47:20 GMT
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rickc@agora.rain.com (Rick Coates) writes:

> This works, but it does a cold boot (reset).  Does anyone out there know
> the magic to cause a warm boot?  It's the same thing, except if a certain

Here's a small Turbo C program I wrote a long time ago. No assembler.

#include <dos.h>
#include <string.h>
#include <stdio.h>

void far (*boot)() = MK_FP(0xffff,0x0000);

void usage(void) {

    puts("Usage: boot [/c] [/w]");
    puts("Options:  /c  cold boot");
    puts("          /w  warm boot (default)");
    exit(1);
}

main(int argc, char **argv) {

    char coldboot = 0;

    while(argc > 1) {
        switch(*argv[1]) {
          case '/':
          case '-':
            switch(argv[1][1]) {
              case 'c':
              case 'C':
                coldboot = 1;
                break;
              case 'w':
              case 'W':
                coldboot = 0;
                break;
              default:
                usage();
            }
            break;
          default:
            usage();
        }
        argc--;
        argv++;
    }

    *((unsigned int far *)(MK_FP(0x0040, 0x0072))) = coldboot ? 0 : 0x1234;
    boot();
}