diff --git a/sys/dev/tc/nvrreg.h b/sys/dev/tc/nvrreg.h
new file mode 100644
index 000000000000..f0e4d7e83476
--- /dev/null
+++ b/sys/dev/tc/nvrreg.h
@@ -0,0 +1,59 @@
+/* 	$NetBSD: nvrreg.h,v 1.1 1999/11/29 15:06:28 ad Exp $ 	*/
+
+/*
+ * Copyright (c) 1999 Andy Doran <ad@NetBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#ifndef _TC_NVRREG_H_
+#define _TC_NVRREG_H_ 1
+
+/* Offsets within PrestoServe's slot */ 
+#define	NVR_CSR 	0x00100000	/* Control and status register */
+#define	NVR_DAR        	0x00100004	/* DMA address register */
+#define NVR_BAT		0x00100008	/* Battery control register */
+#define NVR_MAR		0x0010000C	/* ? */
+#define NVR_BCR		0x00100010	/* DMA burst count register */
+
+/* CSR register bit definitions (R/W) */
+#define	NVRCSR_DMA_GO		0x00000001
+#define NVRCSR_ANTIHOG		0x00000002
+#define NVRCSR_DMA_DONE		0x00000080
+#define NVRCSR_BURST_128_BYTES	0x00000800
+#define NVRCSR_ENBL_PARITY	0x00001000
+#define NVRCSR_ENBL_BAT_INT	0x00002000
+#define NVRCSR_ENBL_DONE_INT	0x00004000
+#define NVRCSR_ENBL_ERR_INT	0x00008000
+
+/* CSR register bit definitions (R) */
+#define	NVRCSR_BAT_DISCONNECT	0x00100000
+#define NVRCSR_BAT_FAIL		0x00400000
+#define NVRCSR_TC_ERROR		0x01000000
+#define	NVRCSR_MEMORY_ERROR	0x02000000
+#define MVRCSR_TC_PARITY_ERR	0x04000000
+#define NVRCSR_TC_PROTCAL_ERR	0x08000000        
+#define NVRCSR_ERROR_SUM	0x80000000
+
+#endif	/* _TC_NVRREG_H_ */