diff --git a/kernel/io.c b/kernel/io.c
new file mode 100644
index 0000000..9b630ef
--- /dev/null
+++ b/kernel/io.c
@@ -0,0 +1,10 @@
+unsigned char port_byte_in(unsigned short port) {
+	unsigned char res;
+	__asm__("in %%dx, %%al" : "=a" (res) : "d" (port));
+
+	return res;
+}
+
+void port_byte_out(unsigned short port, unsigned char data) {
+	
+}
diff --git a/kernel/io.h b/kernel/io.h
new file mode 100644
index 0000000..e69de29