diff --git a/src/Makefile.am b/src/Makefile.am
index 73739a8f4..4d9186cf1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -10,5 +10,5 @@ libhamlib_la_CFLAGS = -DIN_HAMLIB $(AM_CFLAGS) -DHAMLIB_MODULE_DIR=\"$(libdir)\"
 libhamlib_la_LIBADD = @LIBLTDL@ $(top_builddir)/lib/libmisc.la @MATH_LIBS@
 
 noinst_HEADERS = event.h misc.h serial.h iofunc.h cal.h tones.h \
-			rot_conf.h token.h idx_builtin.h register.h
+			rot_conf.h token.h idx_builtin.h register.h par_nt.h
 
diff --git a/src/par_nt.h b/src/par_nt.h
new file mode 100644
index 000000000..6fe5f8143
--- /dev/null
+++ b/src/par_nt.h
@@ -0,0 +1,55 @@
+/* NT Parport Access stuff - Matthew Duggan (2002) */
+
+/* 
+ * ParallelVdm Device (0x2C) is mostly undocumented, used by VDM for parallel 
+ * port compatibility.
+ */
+
+/* 
+ * Different from CTL_CODE in DDK, limited to ParallelVdm but makes this 
+ * code cleaner.
+ */
+
+#ifndef _PAR_NT_H
+
+#define _PAR_NT_H
+
+#define NT_CTL_CODE( Function ) ( (0x2C<<16) | ((Function) << 2) )
+
+/* IOCTL codes */
+#define NT_IOCTL_DATA      NT_CTL_CODE(1) /* Write Only */
+#define NT_IOCTL_CONTROL   NT_CTL_CODE(2) /* Read/Write */
+#define NT_IOCTL_STATUS    NT_CTL_CODE(3) /* Read Only  */
+
+
+/*
+ * Raw port access (PC-style port registers but within inversions)
+ * Functions returning int may fail.
+ */
+
+/* The status pin functions operate in terms of these bits: */
+enum ieee1284_status_bits
+{
+  S1284_NFAULT = 0x08,
+  S1284_SELECT = 0x10,
+  S1284_PERROR = 0x20,
+  S1284_NACK   = 0x40,
+  S1284_BUSY   = 0x80,
+  /* To convert those values into PC-style register values, use this: */
+  S1284_INVERTED = S1284_BUSY
+};
+
+/* The control pin functions operate in terms of these bits: */
+enum ieee1284_control_bits
+{
+  C1284_NSTROBE   = 0x01,
+  C1284_NAUTOFD   = 0x02,
+  C1284_NINIT     = 0x04,
+  C1284_NSELECTIN = 0x08,
+  /* To convert those values into PC-style register values, use this: */
+  C1284_INVERTED = (C1284_NSTROBE|
+		    C1284_NAUTOFD|
+		    C1284_NSELECTIN)
+};
+
+#endif	/* _PAR_NT_H */