first commit

Makefile

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+ASM=nasm
+
+SRC_DIR=src
+BUILD_DIR=build
+
+.PHONY: all floppy_image kernel bootloader clean always
+
+#
+# Floppy image
+#
+floppy_image: $(BUILD_DIR)/main_floppy.img
+
+$(BUILD_DIR)/main_floppy.img: bootloader kernel
+	dd if=/dev/zero of=$(BUILD_DIR)/main_floppy.img bs=512 count=2880
+	mkfs.fat -F 12 -n "NBOS" $(BUILD_DIR)/main_floppy.img
+	dd if=$(BUILD_DIR)/bootloader.bin of=$(BUILD_DIR)/main_floppy.img conv=notrunc
+	mcopy -i $(BUILD_DIR)/main_floppy.img $(BUILD_DIR)/kernel.bin "::kernel.bin"
+
+#
+# Bootlader
+#
+bootloader: $(BUILD_DIR)/bootloader.bin
+
+$(BUILD_DIR)/bootloader.bin: always
+	$(ASM) $(SRC_DIR)/bootloader/boot.asm -f bin -o $(BUILD_DIR)/bootloader.bin
+
+#
+# Kernel
+#
+kernel: $(BUILD_DIR)/kernel.bin
+
+$(BUILD_DIR)/kernel.bin: always
+	$(ASM) $(SRC_DIR)/kernel/main.asm -f bin -o $(BUILD_DIR)/kernel.bin
+
+#
+# Always
+#
+always:
+	mkdir -p $(BUILD_DIR)
+
+#
+# Clean
+#
+clean:
+	rm -rf $(BUILD_DIR)/*
+
+#
+# Run
+#
+run: $(BUILD_DIR)/main_floppy.img
+	qemu-system-i386 -fda build/main_floppy.img
+
+#
+#
+# Debug
+debug: $(BUILD_DIR)/main_floppy.img
+	bochs -f bochs_config