diff --git a/src/cvtDctsdr/special.h b/src/cvtDctsdr/special.h
new file mode 100644
index 000000000..0684949de
--- /dev/null
+++ b/src/cvtDctsdr/special.h
@@ -0,0 +1,54 @@
+/* special.h */
+/* share/epicsH $Id$ */
+
+/*
+ *      Author:          Marty Kraimer
+ *      Date:            6-1-90
+ *
+ *      Experimental Physics and Industrial Control System (EPICS)
+ *
+ *      Copyright 1991, the Regents of the University of California,
+ *      and the University of Chicago Board of Governors.
+ *
+ *      This software was produced under  U.S. Government contracts:
+ *      (W-7405-ENG-36) at the Los Alamos National Laboratory,
+ *      and (W-31-109-ENG-38) at Argonne National Laboratory.
+ *
+ *      Initial development by:
+ *              The Controls and Automation Group (AT-8)
+ *              Ground Test Accelerator
+ *              Accelerator Technology Division
+ *              Los Alamos National Laboratory
+ *
+ *      Co-developed with
+ *              The Controls and Computing Group
+ *              Accelerator Systems Division
+ *              Advanced Photon Source
+ *              Argonne National Laboratory
+ *
+ * Modification Log:
+ * -----------------
+ * .01  06-07-91        mrk     Cleaned up
+ * .02  03-04-92        jba     Added special Hardware Link
+ * .03  07-27-93	mrk	Added SPC_ALARMACK
+ * .04  02-09-94	mrk	Added SPC_AS
+ */
+
+#ifndef INCspecialh
+#define INCspecialh 1
+/* types 1-99 are global. Record specific must start with 100 */
+#define SPC_NOMOD	1	/*Field must not be modified			*/
+#define SPC_DBADDR	2	/*db_name_to_addr must call cvt_dbaddr	*/
+#define SPC_SCAN	3	/*A scan related field is being changed		*/
+#define SPC_HDWLINK	4	/*Special Hardware Link		*/
+#define SPC_ALARMACK	5	/*Special Alarm Acknowledgement*/
+#define SPC_AS		6	/* Access Security*/
+/* useful when record support must be notified of a field changing value*/
+#define SPC_MOD		100
+/* used by all records that support a reset field		*/
+#define SPC_RESET	101	/*The res field is being modified*/
+/* Specific to conversion (Currently only ai */
+#define SPC_LINCONV	102	/*A linear conversion field is being changed*/
+/* Specific to calculation records */
+#define SPC_CALC	103	/*The CALC field is being changed*/
+#endif