1 /* $OpenBSD: ns16450reg.h,v 1.2 1996/10/31 01:01:35 niklas Exp $ */ 2 /* $NetBSD: ns16450reg.h,v 1.3 1994/10/27 04:18:42 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1991 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)ns16450.h 7.1 (Berkeley) 5/9/91 37 */ 38 39 /* 40 * NS16450 UART registers 41 */ 42 43 #define com_data 0 /* data register (R/W) */ 44 #define com_dlbl 0 /* divisor latch low (W) */ 45 #define com_dlbh 1 /* divisor latch high (W) */ 46 #define com_ier 1 /* interrupt enable (W) */ 47 #define com_iir 2 /* interrupt identification (R) */ 48 #define com_lctl 3 /* line control register (R/W) */ 49 #define com_cfcr 3 /* line control register (R/W) */ 50 #define com_mcr 4 /* modem control register (R/W) */ 51 #define com_lsr 5 /* line status register (R/W) */ 52 #define com_msr 6 /* modem status register (R/W) */ 53