diff --git a/hbasm/assets/serial_driver.hbasm b/hbasm/assets/serial_driver.hbasm
new file mode 100644
index 00000000..306bbf7a
--- /dev/null
+++ b/hbasm/assets/serial_driver.hbasm
@@ -0,0 +1,7 @@
+jmp r0, start
+start:
+    jmp r0, init_serial_port
+
+-- Uses r20 to set the port
+init_serial_port:
+    add r20, r30, r10