diff --git a/sys/dev/isa/cs89x0var.h b/sys/dev/isa/cs89x0var.h
new file mode 100644
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+++ b/sys/dev/isa/cs89x0var.h
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+/*	$NetBSD: cs89x0var.h,v 1.1 1998/07/21 01:04:01 thorpej Exp $	*/
+
+/*
+ * Copyright 1997
+ * Digital Equipment Corporation. All rights reserved.
+ *
+ * This software is furnished under license and may be used and
+ * copied only in accordance with the following terms and conditions.
+ * Subject to these conditions, you may download, copy, install,
+ * use, modify and distribute this software in source and/or binary
+ * form. No title or ownership is transferred hereby.
+ *
+ * 1) Any source code used, modified or distributed must reproduce
+ *    and retain this copyright notice and list of conditions as
+ *    they appear in the source file.
+ *
+ * 2) No right is granted to use any trade name, trademark, or logo of
+ *    Digital Equipment Corporation. Neither the "Digital Equipment
+ *    Corporation" name nor any trademark or logo of Digital Equipment
+ *    Corporation may be used to endorse or promote products derived
+ *    from this software without the prior written permission of
+ *    Digital Equipment Corporation.
+ *
+ * 3) This software is provided "AS-IS" and any express or implied
+ *    warranties, including but not limited to, any implied warranties
+ *    of merchantability, fitness for a particular purpose, or
+ *    non-infringement are disclaimed. In no event shall DIGITAL be
+ *    liable for any damages whatsoever, and in particular, DIGITAL
+ *    shall not be liable for special, indirect, consequential, or
+ *    incidental damages or damages for lost profits, loss of
+ *    revenue or loss of use, whether such damages arise in contract,
+ *    negligence, tort, under statute, in equity, at law or otherwise,
+ *    even if advised of the possibility of such damage.
+ */
+
+/*
+**++
+**  FACILITY  Crystal CS8900 Ethernet driver header file
+**
+**  ABSTRACT
+**
+**     This module provides CS8900 driver softc and related definitions
+**
+**  AUTHORS
+**
+**     Peter Dettori   SEA - Software Engineering.
+**
+**  CREATION DATE:
+**
+**       13-Feb-1997.
+**
+**  MODIFICATION HISTORY:
+**
+**--
+*/
+
+#ifndef _DEV_ISA_CS89X0VAR_H_
+#define	_DEV_ISA_CS89X0VAR_H_
+
+/*
+ * Ethernet software status per interface.
+ *
+ * Each interface is referenced by a network interface structure,
+ * arpcom.ac_if, which the routing code uses to locate the interface.
+ * This structure contains the output queue for the interface, 
+ * its address, ...
+ */
+struct cs_softc {
+	struct device sc_dev;		/* base device glue */
+	struct ethercom sc_ethercom;	/* Ethernet common */
+
+	void	*sc_ih;			/* interupt handler */
+	void 	*sc_sh;			/* shutdown hook */
+
+	bus_space_tag_t sc_iot;		/* bus space tag for IO */
+	bus_space_tag_t sc_memt;	/* bus space tag for memory mode */
+	bus_space_handle_t sc_ioh;	/* bus space handles */
+	bus_space_handle_t sc_memh;
+
+	isa_chipset_tag_t sc_ic;	/* ISA chipset */
+
+	int	sc_irq;			/* IRQ line */
+	int	sc_drq;			/* DRQ line */
+
+	bus_addr_t sc_pktpgaddr;	/* PacketPage bus memory address */
+
+	bus_size_t sc_dmasize;		/* DMA size (16k or 64k) */
+	caddr_t	sc_dmabase;		/* base DMA address (KVA) */
+	caddr_t	sc_dmacur;		/* current DMA address (KVA) */
+
+	int	sc_cfgflags;		/* software configuration flags */
+	int	sc_mediatype;		/* media type (XXX if_media) */
+
+	int	sc_memorymode;		/* are we in memory mode? */
+	int	sc_txbusy;		/* transmit in progress */
+	int	sc_resetting;		/* reset in progress */
+
+	int	sc_xe_ent;		/* current early-xmit table entry */
+	int	sc_xe_togo;		/* # of packets to go at this ent */
+
+	u_int8_t sc_enaddr[6];		/* MAC address */
+};
+
+/*
+ * Macros for reading/writing the packet page area.
+ */
+#define	CS_READ_PACKET_PAGE_IO(iot, ioh, offset)			\
+	(bus_space_write_2((iot), (ioh), PORT_PKTPG_PTR, (offset)),	\
+	 bus_space_read_2((iot), (ioh), PORT_PKTPG_DATA))
+
+#define	CS_READ_PACKET_PAGE_MEM(memt, memh, offset)			\
+	bus_space_read_2((memt), (memh), (offset))
+
+#define	CS_READ_PACKET_PAGE(sc, offset)					\
+	((sc)->sc_memorymode ? CS_READ_PACKET_PAGE_MEM((sc)->sc_memt,	\
+			       (sc)->sc_memh, (offset)) :		\
+	 CS_READ_PACKET_PAGE_IO((sc)->sc_iot, (sc)->sc_ioh, (offset)))
+
+#define	CS_WRITE_PACKET_PAGE_IO(iot, ioh, offset, val)			\
+do {									\
+	bus_space_write_2((iot), (ioh), PORT_PKTPG_PTR, (offset));	\
+	bus_space_write_2((iot), (ioh), PORT_PKTPG_DATA, (val));	\
+} while (0)
+
+#define	CS_WRITE_PACKET_PAGE_MEM(memt, memh, offset, val)		\
+	bus_space_write_2((memt), (memh), (offset), (val))
+
+#define	CS_WRITE_PACKET_PAGE(sc, offset, val)				\
+do {									\
+	if ((sc)->sc_memorymode)					\
+		CS_WRITE_PACKET_PAGE_MEM((sc)->sc_memt, (sc)->sc_memh,	\
+		    (offset), (val));					\
+	else								\
+		CS_WRITE_PACKET_PAGE_IO((sc)->sc_iot, (sc)->sc_ioh,	\
+		    (offset), (val));					\
+} while (0)
+
+/* Return Status */
+#define	CS_ERROR   -1
+#define CS_OK       1
+		
+/* Config Flags in cs_softc */
+
+#define CFGFLG_MEM_MODE     0x0001
+#define CFGFLG_USE_SA       0x0002
+#define CFGFLG_IOCHRDY      0x0004
+#define CFGFLG_DCDC_POL     0x0008
+#define CFGFLG_FDX          0x0010
+#define CFGFLG_DMA_MODE	    0x0020
+#define CFGFLG_NOT_EEPROM   0x8000
+
+
+/* Media Type in cs_softc */
+
+#define MEDIA_AUI           0x0001
+#define MEDIA_10BASE2       0x0002
+#define MEDIA_10BASET       0x0003
+
+
+/* Miscellaneous definitions */
+
+#define MAXLOOP            0x8888
+
+#endif /* _DEV_ISA_CS89X0VAR_H_ */