Talk:BIOS Upgrade:Creating a Bootable CD from a Floppy Image
I added 3b because cd created by mkisofs -pad -b NAME_OF_FLOPPY_IMAGE.IMG -R -o /home/your_user_name/cd.iso /patch/to/the/image/file/NAME_OF_FLOPPY_IMAGE.IMG simple didn't work for me. running mkisofs -b NAME_OF_FLOPPY_IMAGE.IMG -o bootcd.iso NAME_OF_FLOPPY_IMAGE.IMG instead did the job.