disk_numsec = 720
#disk_numsec = 2880

bin = bootldr
img = bootldr.img

CC = ia16-elf-gcc
LD = ia16-elf-ld

CFLAGS = -march=i8088 -mtune=i8088 -DFLOPPY360

$(img): $(bin)
	dd if=/dev/zero of=$@ bs=512 count=$(disk_numsec)
	dd if=$< of=$@ bs=512 conv=notrunc

$(bin): boot/boot.o boot/boot2.o boot/main.o
	$(LD) -T boot.ld -Map boot.map -o $@ $^

%.o: %.asm
	nasm -o $@ -f elf $<

.PHONY: clean
clean:
	rm -f boot/*.o $(bin)


.PHONY: run
run: $(img)
	qemu-system-i386 -fda $(img) -serial file:serial.log

.PHONY: debug
debug: $(img)
	qemu-system-i386 -fda $(img) -serial file:serial.log -s -S

.PHONY: disasm
disasm: $(bin)
	ndisasm -o 0x7c00 $< >dis1
	ndisasm -o 0x80000 -e 512 $< >dis2