From: "rw" <rw AT rw DOT com>
Newsgroups: comp.os.msdos.djgpp
References: <xcEM5.2239$mx DOT 50892 AT news1 DOT oke DOT nextra DOT no> <2950-Sat04Nov2000085212+0200-eliz AT is DOT elta DOT co DOT il>
Subject: Re: sectors
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Message-ID: <hJXM5.2757$mx.61209@news1.oke.nextra.no>
Date: Sat, 4 Nov 2000 18:21:06 +0100
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

I made a program that works with biosdisk :
#include <bios.h>
#include <stdio.h>
void main(int argc,char *argv[])
{
FILE *fil;
long lax;
unsigned char buffer[520];
printf("BootSectorCopy v1.0 by Eivind A. Moland (Made for eamOS)\n");
if(argv[1]==NULL) {
printf("Usage: [%s] [file] [sector]",argv[0]);
exit(0);
}
if(argv[2]==NULL) {
printf("Usage: [%s] [file] [sector]",argv[0]);
exit(0);
}
fil = fopen(argv[1], "rb");
if(fil==NULL) {
printf("Can't Load File");
exit(0);
}
lax = atoi(argv[2]);
fread(&buffer, 512, 1, fil);
while(biosdisk(3, 0, 0, 0, lax, 1, buffer));
fclose(fil);
printf("Done!");
}

It writes a binary file to a sector on a floppy.
It works to .. there is a error i cant figure out..
I do BootSectorCopy boot.bin 1 to write boot.bin to the bootsector (first
sector) and everything works ok.
Then i do BootSectorCopy something.bin 2 to write something.bin to the
second sector. the something.bin is 512 bytes but when i write it to the
floppy it takes up like 135kb (wierd)..
I use dos debug to L 100 0 1 1(load the sector) and D(dump the sector) and i
see that the code on the sector is NOT the code in my something.bin .. its
something else ... and i dont know what ... ;(
Thats why i wanted to try writeing the sector with something else.
anyone know what could be wrong?