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diff --git a/i386/i386at/if_de6c.h b/i386/i386at/if_de6c.h
deleted file mode 100644
index 9d8e9b8..0000000
--- a/i386/i386at/if_de6c.h
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@@ -1,113 +0,0 @@
-/*
- * Mach Operating System
- * Copyright (c) 1992 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
-
-/*
- * HISTORY
- * $Log: if_de6c.h,v $
- * Revision 1.1.1.1 1996/10/30 01:39:26 thomas
- * Imported from UK22
- *
- * Revision 1.2 1994/11/08 20:47:25 baford
- * merged in CMU's MK83-MK83a diffs
- *
- * Revision 2.2 93/11/17 18:32:40 dbg
- * Moved source into kernel/i386at/DLINK/if_de6c.c, since we
- * can't release it but don't want to lose it.
- * [93/11/17 dbg]
- *
- * Removed local declaration of HZ.
- * [93/01/29 dbg]
- *
- * Created.
- * [92/08/13 rvb]
- *
- */
-
-/* PC/FTP Packet Driver source, conforming to version 1.09 of the spec
- * Portions (C) Copyright 1990 D-Link, Inc.
- *
- * Permission is granted to any individual or institution to use, copy,
- * modify, or redistribute this software and its documentation provided
- * this notice and the copyright notices are retained. This software may
- * not be distributed for profit, either in original form or in derivative
- * works. D-Link, inc. makes no representations about the suitability
- * of this software for any purpose. D-LINK GIVES NO WARRANTY,
- * EITHER EXPRESS OR IMPLIED, FOR THE PROGRAM AND/OR DOCUMENTATION
- * PROVIDED, INCLUDING, WITHOUT LIMITATION, WARRANTY OF MERCHANTABILITY
- * AND WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-
-#define DATA(port) (port + 0)
-#define STAT(port) (port + 1)
-#define CMD(port) (port + 2)
-
-/* DE-600's DATA port Command */
-#define WRITE 0x00 /* write memory */
-#define READ 0x01 /* read memory */
-#define STATUS 0x02 /* read status register */
-#define COMMAND 0x03 /* write command register */
-#define RX_NONE 0x00 /* M1=0, M0=0 (bit 1,0) */
-#define RX_ALL 0x01 /* M1=0, M0=1 */
-#define RX_BP 0x02 /* M1=1, M0=0 */
-#define RX_MBP 0x03 /* M1=1, M0=1 */
-#define TXEN 0x04 /* bit 2 */
-#define RXEN 0x08 /* bit 3 */
-#define LOOPBACK 0x0c /* RXEN=1, TXEN=1 */
-#define IRQINV 0x40 /* bit 6 -- IRQ inverse */
-#define RESET 0x80 /* set bit 7 high */
-#define STOP_RESET 0x00 /* set bit 7 low */
-#define NUL_CMD 0x04 /* null command */
-#define RX_LEN 0x05 /* read Rx packet length */
-#define TX_ADR 0x06 /* write Tx address */
-#define RW_ADR 0x07 /* write memory address */
-
-/* DE-600's CMD port Command */
-/* #define CMD(port) (port + 2) */
-#define SLT_NIC 0x04 /* select Network Interface Card */
-#define SLT_PRN 0x1c /* select Printer */
-#define NML_PRN 0xec /* normal Printer situation */
-#define IRQEN 0x10 /* enable IRQ line */
-
-/* DE-600's STAT port bits 7-4 */
-/* #define STAT(port) (port + 1) */
-#define RXBUSY 0x80
-#define GOOD 0x40
-#define RESET_FLAG 0x20
-#define T16 0x10
-#define TXBUSY 0x08
-
-#define STROBE 0x08
-#define EADDR 0x2000 /* HA13=0 => Mem, HA13=1 => Node Num */
-#define BFRSIZ 0x0800 /* number of bytes in a buffer */
-#define BFRS 4
-
-#define DSF_LOCK 1
-#define DSF_RUNNING 2
-
-#define MOD_ENAL 1
-#define MOD_PROM 2
-