Makefile

ASM=nasm

SRC_DIR=src
BUILD_DIR=build

.PHONY: all floppy_image kernal bootloader clean always

# 
# Floppy Image
#
floppy_image: $(BUILD_DIR)/main_floppy.img

$(BUILD_DIR)/main_floppy.img: bootloader kernal
	dd if=/dev/zero of=$(BUILD_DIR)/main_floppy.img bs=512 count=2880
	mkfs.fat -F 12 -n "SKOS" $(BUILD_DIR)/main_floppy.img
	dd if=$(BUILD_DIR)/bootloader.bin of=$(BUILD_DIR)/main_floppy.img conv=notrunc
	mcopy -i $(BUILD_DIR)/main_floppy.img $(BUILD_DIR)/kernal.bin "::kernal.bin"

#
# Bootloader
#
bootloader: $(BUILD_DIR)/bootloader.bin

$(BUILD_DIR)/bootloader.bin: always
	$(ASM) $(SRC_DIR)/bootloader/boot.asm -f bin -o $(BUILD_DIR)/bootloader.bin

#
# Kernal
#
kernal: $(BUILD_DIR)/kernal.bin

$(BUILD_DIR)/kernal.bin: always
	$(ASM) $(SRC_DIR)/kernal/main.asm -f bin -o $(BUILD_DIR)/kernal.bin

#
# always
#
always:
	mkdir -p $(BUILD_DIR)

#
# clean
#
clean:
	rm -rf $(BUILD_DIR)/*