On a PI-hosted dev system:
Use this to save this program into partition 1 suitable for loading and executing by using the firmware.asm boot-ROM code in ../boot:
sudo dd if=hello.bin of=/dev/sda1 bs=512
Use this command to save this program into the raw disk drive (overwriting the MBR!) suitable for loading and executing by using the sd_test.asm boot-ROM code in ../tests:
sudo dd if=/dev/zero of=/dev/sda bs=512 count=1
sudo dd if=hello.bin of=/dev/sda bs=512