read&write
nasm -f bin mybios.asm -o mybios.bin
qemu-system-i386 -bios mybios.bin -nographic
nasm -f bin myboot.asm -o myboot.bin
qemu-system-i386 -M pc -drive file=myboot.bin,format=raw,index=0,media=disk -display curses
nasm -f bin mybios.asm -o mybios.bin
qemu-system-i386 -bios mybios.bin -nographic
nasm -f bin myboot.asm -o myboot.bin
qemu-system-i386 -M pc -drive file=myboot.bin,format=raw,index=0,media=disk -display curses