Add changes related to c implementation, printf

Makefile

@@ -0,0 +1,68 @@
+ASM=nasm
+CC=gcc
+CC16=/opt/watcom/binl/wcc
+LD16=/opt/watcom/binl/wlink
+
+BUILD_DIR=build
+SRC_DIR=src
+TOOLS_DIR=tools
+
+.PHONY: all floppy_image kernel bootloader clean always tools_fat
+
+all: floppy_image tools_fat
+
+#
+# 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 "chaOS" $(BUILD_DIR)/main_floppy.img
+	dd if=${BUILD_DIR}/stage1.bin of=${BUILD_DIR}/main_floppy.img conv=notrunc
+	mcopy -i $(BUILD_DIR)/main_floppy.img $(BUILD_DIR)/stage2.bin "::stage2.bin"
+	mcopy -i $(BUILD_DIR)/main_floppy.img $(BUILD_DIR)/kernel.bin "::kernel.bin"
+	mcopy -i $(BUILD_DIR)/main_floppy.img test.txt "::test.txt"
+
+#
+# Bootloader
+#
+bootloader: stage1 stage2 
+
+stage1: $(BUILD_DIR)/stage1.bin
+
+
+$(BUILD_DIR)/stage1.bin: always
+	$(MAKE) -C $(SRC_DIR)/bootloader/stage1 BUILD_DIR=$(abspath $(BUILD_DIR))
+
+stage2: $(BUILD_DIR)/stage2.bin
+
+$(BUILD_DIR)/stage2.bin: always
+	$(MAKE) -C $(SRC_DIR)/bootloader/stage2 BUILD_DIR=$(abspath $(BUILD_DIR))
+
+#
+# Kernel
+#
+kernel: $(BUILD_DIR)/kernel.bin
+$(BUILD_DIR)/kernel.bin: always
+	$(MAKE) -C $(SRC_DIR)/kernel BUILD_DIR=$(abspath $(BUILD_DIR))
+
+#
+# Tools
+#
+tools_fat: $(BUILD_DIR)/tools/fat
+$(BUILD_DIR)/tools/fat: always $(TOOLS_DIR)/fat/fat.c
+	mkdir -p $(BUILD_DIR)/tools
+	$(CC) $(TOOLS_DIR)/fat/fat.c -g -o $(BUILD_DIR)/tools/fat
+
+always:
+	mkdir -p $(BUILD_DIR)
+
+#
+# Clean
+#
+clean:
+	$(MAKE) -C $(SRC_DIR)/bootloader/stage1 BUILD_DIR=$(abspath $(BUILD_DIR)) clean
+	$(MAKE) -C $(SRC_DIR)/bootloader/stage2 BUILD_DIR=$(abspath $(BUILD_DIR)) clean
+	$(MAKE) -C $(SRC_DIR)/kernel BUILD_DIR=$(abspath $(BUILD_DIR)) clean
+	rm -rf $(BUILD_DIR)/*