diff --git a/gen164/5/co.c b/gen164/5/co.c
new file mode 100644
index 000000000..f1cfcd9b3
--- /dev/null
+++ b/gen164/5/co.c
@@ -0,0 +1,28 @@
+/* gen164/5/co.c
+**
+** This file is in the public domain.
+*/
+#include "all.h"
+#include "../pit.h"
+
+/* declarations
+*/
+  extern u2_ho_jet j2_mdj(Pt5, coco, co, emco)[];
+  extern u2_ho_jet j2_mdj(Pt5, coco, co, oxco)[];
+  extern u2_ho_jet j2_mdj(Pt5, coco, co, roco)[];
+
+  u2_ho_driver
+  j2_mcd(Pt5, coco, co)[] = {
+    { j2_sd(Pt5, coco, co, emco), j2_mdj(Pt5, coco, co, emco), 0, 0, u2_none },
+    { j2_sd(Pt5, coco, co, oxco), j2_mdj(Pt5, coco, co, oxco), 0, 0, u2_none },
+    { j2_sd(Pt5, coco, co, roco), j2_mdj(Pt5, coco, co, roco), 0, 0, u2_none },
+    {}
+  };
+
+/* structures
+*/
+  u2_ho_driver
+  j2_mbd(Pt5, coco)[] = {
+    { j2_sc(Pt5, coco, co), 0, j2_mcd(Pt5, coco, co), 0, u2_none },
+    {}
+  };