diff --git a/atom/types.go b/atom/types.go
new file mode 100644
index 0000000..56ca122
--- /dev/null
+++ b/atom/types.go
@@ -0,0 +1,14 @@
+
+package atom
+
+type Fixed uint32
+type TimeStamp uint32
+
+func IntToFixed(val int) Fixed {
+	return Fixed(val<<16)
+}
+
+func FixedToInt(val Fixed) int {
+	return int(val>>16)
+}
+