fetch the base floppy as well.

os/Makefile

build: first.flp
first.flp: first.bin
first.flp: mikeos.flp first.bin
	cp mikeos.flp first.flp
	dd status=noxfer conv=notrunc if=first.bin of=first.flp
first.bin: first.asm
	nasm -f bin -o first.bin first.asm
mikeos.flp:
	curl -so mikeos.zip http://mikeos.sourceforge.net/mikeos-4.5b1.zip
	unzip -p mikeos.zip mikeos-4.5b1/disk_images/mikeos.flp > mikeos.flp
	rm mikeos.zip
run: first.flp
	qemu-system-i386 -fda first.flp