1/* $NetBSD: lptreg.h,v 1.9 2005/12/11 12:21:27 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)lptreg.h 1.1 (Berkeley) 12/19/90 35 */ 36 37/* 38 * AT Parallel Port (for lineprinter) 39 * Interface port and bit definitions 40 * Written by William Jolitz 12/18/90 41 * Copyright (C) William Jolitz 1990 42 */ 43 44/* 45 * On a standard DB25 parallel port, the bits show up as follows: 46 * 47 * 13 12 11 10 9 8 7 6 5 4 3 2 1 48 * S4 S5 ~S7 S6 D7 D6 D5 D4 D3 D2 D1 D0 ~C0 49 * 50 * G G G G G G G G ~C3 C2 S3 ~C1 51 * 25 24 23 22 21 20 19 18 17 16 15 14 52 * 53 * D7-D0 are output bits from the data register 54 * S7-S3 are input bits read at the status register 55 * C3-C0 are output bits from the control register 56 */ 57 58#define lpt_data 0 /* Data to/from printer (R/W) */ 59 60#define lpt_status 1 /* Status of printer (R) */ 61#define LPS_NERR 0x08 /* printer no error */ 62#define LPS_SELECT 0x10 /* printer selected */ 63#define LPS_NOPAPER 0x20 /* printer out of paper */ 64#define LPS_NACK 0x40 /* printer no ack of data */ 65#define LPS_NBSY 0x80 /* printer not busy */ 66 67#define lpt_control 2 /* Control printer (R/W) */ 68#define LPC_STROBE 0x01 /* strobe data to printer */ 69#define LPC_AUTOLF 0x02 /* automatic linefeed */ 70#define LPC_NINIT 0x04 /* initialize printer */ 71#define LPC_SELECT 0x08 /* printer selected */ 72#define LPC_IENABLE 0x10 /* printer out of paper */ 73 74#define LPT_NPORTS 4 75