Category : System Diagnostics for your computer
Archive   : TRACK0.ZIP
Filename : RT0.C

 
Output of file : RT0.C contained in archive : TRACK0.ZIP
#include
#include
#include
#include
#include
#include
#include
#include

/*
* This program will restore your hard disk's track zero data. It
* is specifically designed to provide a remedy against the the so-called
* "Columbus day" virus.
*
* This program may be freely copied.
*
* Author: Dave Bushong, KZ1O [70441,2456]
*
*/

void error(int code)
{
switch (code) {
case 1:
fprintf(stderr, "Unable to allocate enough memory\n");
break;
case 2:
fprintf(stderr, "Unable to open file A:TRACK.000\n");
break;
case 4:
fprintf(stderr, "Unable to complete reading floppy disk\n");
break;
default:
fprintf(stderr, "Unknown error occurred: %d\n", code);
break;
}
exit(code);
}

int main(void)
{
char *buffer;

unsigned cx, dx;
int maxhead, maxsectors, h;
int fd;
unsigned bytes;

printf("Restoring hard disk track zero from A:TRACK.000\n"
"More public domain software from D. Bushong [70441,2456]\n");

_DL = 0x80;
_AH = 8;
geninterrupt(0x13); /* get params */

cx = _CX;
dx = _DX;

maxhead = dx >> 8;
maxsectors = cx & 0x3f;

#ifndef ALLCYLINDER
maxhead=0;
#endif

buffer = calloc(bytes = (maxsectors * 512), 1);
if (buffer == NULL)
error(1);

fd = _open("a:track.000", 0);
if (fd < 0)
error(2);

for (h = 0; h <= maxhead; h++) {
if (_read(fd, buffer, bytes) != bytes)
error(4);
biosdisk(3, 0x80, h, 0, 1, maxsectors, buffer);
}
close(fd);
return 0;
}



  3 Responses to “Category : System Diagnostics for your computer
Archive   : TRACK0.ZIP
Filename : RT0.C
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/