BrokenThorn Entertainment

Hi my name is Jackson and I'm a following the tuturial series and building a bootloader. I'm using Linux Mint 10 for all of the compiling and coding. I'm wondering how to put both of them on a floppy. I like linux and mac but not windows. It would be great if somebody could explain.

dd is your friend. It is much nicer than the windows alternatives.

See man dd for details.

Thanks but how do you put stage2 on it. I've tried to use loopback but it won't work

Yes it really will.

You make a loopback device, dd the bootsector to the beginning, remount it to get the correct filesystem driver, and cp the second stage on.

~Andrew

So it would look like this right?

dd if=Stage1.bin bs512 count=2880 of OS.img

losetup /dev/loop0 OS.img

mkdosfs /dev/loop0

mount -t msdos /dev/loop0 /mnt/MyOS

cp OS.img Stage1.bin

This is the .sh build file I use but when I type
sudo bash
./MyOS/build.sh

It says

Compiling Files...
Copying bootloader to floppy...
1+0 records in
1+0 records out
Copying Kernel and files to floppy...
cp: cannot create regular file `tmp-loop/KRNLDR.SYS': No space left on device
Unmounting loopback floppy
Done

Why does it say "cp: cannot create regular file `tmp-loop/KRNLDR.SYS': No space left on device "

So no matter what if run it in qemu it won't work because the Stage2 file is not on the floppy image because

Here's the file I don't know why but, it won't work.

if test "`whoami`" != "root" ; then
echo "You must be logged in as root to build"
echo "Enter su or sudo bash to switch to root"
exit
fi

if [ ! -e coppingos.flp]
then
echo "Making Floppy..."
mkdosfs -C MyOS/MyOS.flp 1440 || exit
fi

echo "Compiling Files..."
nasm MyOS/Stage2.asm -o MyOS/KRNLDR.SYS
nasm MyOS/Stage1.asm -o MyOS/Stage1.bin

echo "Copying bootloader to floppy..."

dd status=noxfer conv=notrunc if=MyOS/Stage1.bin of=MyOS/MyOS.flp || exit

echo "Copying Kernel and files to floppy..."

rm -rf tmp-loop

mkdir tmp-loop && mount -o loop -t vfat MyOS/MyOS.flp tmp-loop && cp MyOS/KRNLDR.SYS tmp-loop

echo "Unmounting loopback floppy"

umount tmp-loop || exit

rm -rf tmp-loop

echo "Done"

Here is an article which may be useful: http://wiki.osdev.org/GRUB#Installing_to_floppy

And as a tip, you can type #!/bin/bash in the first line of your shell script, then enable permission to execute file (from Properties - Permissions), and then you can launch it as executable.