diff --git a/src/io_type_pkg.vhd b/src/io_type_pkg.vhd
new file mode 100644
index 0000000..63a940c
--- /dev/null
+++ b/src/io_type_pkg.vhd
@@ -0,0 +1,22 @@
+library IEEE;
+use IEEE.MATH_REAL.all;
+
+package io_types is
+
+  type interface_def_t is record
+    name: string (1 to 20);
+    payload_width, control_width: natural;
+  end record interface_def_t;
+
+  type interface_arr_t is array (natural range <>) of interface_def_t;
+    
+  constant interface_arr : interface_arr_t := (
+    0 => ("SoCBridge x         ", 8, 2),
+    1 => ("SoCBridge  x        ", 8, 2),
+    2 => ("SoCBridge   x       ", 8, 2),
+    3 => ("SoCBridge    x      ", 8, 2),
+    4 => ("SoCBridge     x     ", 8, 2),
+    5 => ("SoCBridge      x    ", 8, 2)
+  );
+  
+end package io_types;
diff --git a/src/test.vhd b/src/test.vhd
new file mode 100644
index 0000000..fc65466
--- /dev/null
+++ b/src/test.vhd
@@ -0,0 +1,25 @@
+library IEEE;
+library work;
+use work.io_types.all;
+
+entity test is
+  port (
+    t : in interface_arr_t(0 to interface_arr'length - 1)
+  );
+end entity test;
+
+architecture rtl of test is
+  
+begin
+  
+  proc_name: process
+  begin
+    
+    for x in 0 to (interface_arr'length - 1) loop
+      report interface_arr(x).name ;
+    end loop;
+  wait;
+  end process proc_name;
+  
+  
+end architecture rtl;