diff --git a/src/io.h b/src/io.h
new file mode 100644
index 0000000..000eb1f
--- /dev/null
+++ b/src/io.h
@@ -0,0 +1,8 @@
+#ifndef _IO_H
+#define _IO_H
+
+void CompileInput(lexer_t *L,reg_t *R,mem_t *M,index_t ioh,char *ioc);
+void CompileOutput(lexer_t *L,reg_t *R,mem_t *M,index_t ioh,char *ioc);
+int  RunIO(context_t *C,op_t * op);
+
+#endif