--- Net2/arch/i386/isa/if_nereg.h	2018/04/24 18:04:01	1.1
+++ Net2/arch/i386/isa/if_nereg.h	2018/04/24 18:20:03	1.1.1.3
@@ -30,21 +30,27 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)if_nereg.h	7.1 (Berkeley) 5/9/91
+ *	from: @(#)if_nereg.h	7.1 (Berkeley) 5/9/91
+ *	if_nereg.h,v 1.2 1993/05/22 08:01:24 cgd Exp
  */
 
 /*
- * NE2000 Ethernet Card registers
+ * NE1000/2000 Ethernet Card registers
  */
 
-/* The NE2000 uses a DS8390 Ethernet controller in at the beginning of
+/* This card uses a DS8390 Ethernet controller in at the beginning of
    its i/o space */
 #include "ic/ds8390.h"
 
 #define ne_data		0x10	/* Data Transfer port */
 #define ne_reset	0x1f	/* Card Reset port */
 
-#define	PKTSZ	3*512
-#define	TBUF	(16*1024)	/* Starting location of Transmit Buffer */
-#define	RBUF	(16*1024+PKTSZ)	/* Starting location of Receive Buffer */
-#define	RBUFEND	(32*1024)	/* Ending location of Transmit Buffer */
+#define	PKTSZ	3*512		/* Size of transmit buffer */
+
+/* Span of memory on an NE2000 */
+#define	TBUF16	(16*1024)	/* Starting location of Transmit Buffer */
+#define	RBUFEND16	(32*1024)	/* Ending location of Receive Buffer */
+
+/* Span of memory on an NE1000 */
+#define	TBUF8	(8*1024)	/* Starting location of Transmit Buffer */
+#define	RBUFEND8	(16*1024)	/* Ending location of Receive Buffer */