implement basic multitasking

Makefile

@@ -1,5 +1,5 @@
 # Define the object files
-OBJS = bin/boot.o bin/kernel.o bin/idt.o bin/isr.o bin/screen.o bin/utils.o bin/string.o bin/stdio.o bin/disk.o bin/pic.o bin/pit.o bin/keyboard.o bin/paging.o bin/fat.o
+OBJS = bin/boot.o bin/kernel.o bin/idt.o bin/isr.o bin/screen.o bin/utils.o bin/string.o bin/stdio.o bin/disk.o bin/pic.o bin/pit.o bin/keyboard.o bin/paging.o bin/fat.o bin/task.o bin/switch.o
 
 # Define the compiler and assembler
 CC = gcc -D__is_katauos
@@ -96,6 +96,12 @@ bin/paging.o: src/paging.c
 bin/fat.o: src/fat.c
 	$(CC) $(CFLAGS) -c $< -o $@
 
+bin/switch.o: src/switch.asm
+	$(AS) $(ASFLAGS) $< -o $@
+
+bin/task.o: src/task.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
 clean:
 	rm -rf bin/
 	rm -f $(OUTPUT)