BIOS_SRC = ./bios
STAGE3_BIN = $(BUILD_DIR)/stage3.elf

$(BUILD_DIR)/bootloader.bin: $(wildcard $(BIOS_SRC)/*.asm) $(STAGE3_BIN)
	@mkdir -p "$(BUILD_DIR)"
	nasm \
		-f bin \
		-o "$@" \
		-l "$@.lst" \
		-D STAGE3="$(STAGE3_BIN)" \
		-i "$(BIOS_SRC)" \
		"$(BIOS_SRC)/bootloader.asm"