OSDev.org

Hello,

I am trying to convert my floppy disk bootloader + kernel to an iso image but when I tried loading it in qemu it said failed to read disk. I am using the kernel found at https://github.com/sukwon0709/osdev. The command I used to convert to iso is:
This will produce a iso file from os-image called bootable.iso.

when I typed:
qemu can't load the kernel. I thought the iso image is emulating the floppy but apparently something went wrong.

If you have a floppy disk bootloader, you'll want a floppy emulated boot, rather than the no-emulation boot you explicitly specify on the command line. The BIOS calls behave differently when booting natively from CD.

The floppy boot image needs to be exactly the 1.4MB of a floppy though, and contain everything you need to find and read from the CD later. If you can properly boot from floppy already, you can make that CD-bootable without much further thought this way.

Combuster wrote:If you have a floppy disk bootloader, you'll want a floppy emulated boot, rather than the no-emulation boot you explicitly specify on the command line. The BIOS calls behave differently when booting natively from CD.

The floppy boot image needs to be exactly the 1.4MB of a floppy though, and contain everything you need to find and read from the CD later. If you can properly boot from floppy already, you can make that CD-bootable without much further thought this way.

what is the command if I want to specify a floppy emulator?