To run this file:
nasm kernel.asm -f bin -o kernel.bin
dd status=noxfer conv=notrunc if=kernel.bin of=kernel.flp
qemu-system-x86_64 -fda kernel.flp
This is a bootable calculator made in assembly, to boot you will need to first make and image file, which would be the .flp generated with the above commands and then run these other couple:
sudo umount /dev/sdc
sudo dd bs=4M if=input.iso of=/dev/sdc
where input.iso is the input file, and /dev/sdc<?> is the USB device you're writing to.