nasm -f bin -o file.bin file.asm # build assembly code
dd if=/dev/zero of=file.img bs=1024 count=1440
dd if=file.bin of=file.img seek=0 count=1 conv=notrunc
mkdir iso
cp file.img iso/
genisoimage -quiet -V '...' -input-charset iso8859-1 -o file.iso -b file.img -hide file.img iso/