/* $NetBSD: lptreg.h,v 1.10 2006/05/02 08:31:02 martin Exp $ */ /*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)lptreg.h 1.1 (Berkeley) 12/19/90 */ /* * AT Parallel Port (for lineprinter) * Interface port and bit definitions * Written by William Jolitz 12/18/90 * Copyright (C) William Jolitz 1990 */ /* * On a standard DB25 parallel port, the bits show up as follows: * * 13 12 11 10 9 8 7 6 5 4 3 2 1 * S4 S5 ~S7 S6 D7 D6 D5 D4 D3 D2 D1 D0 ~C0 * * G G G G G G G G ~C3 C2 S3 ~C1 * 25 24 23 22 21 20 19 18 17 16 15 14 * * D7-D0 are output bits from the data register * S7-S3 are input bits read at the status register * C3-C0 are output bits from the control register */ #define lpt_data 0 /* Data to/from printer (R/W) */ #define lpt_status 1 /* Status of printer (R) */ #define LPS_NERR 0x08 /* printer no error */ #define LPS_SELECT 0x10 /* printer selected */ #define LPS_NOPAPER 0x20 /* printer out of paper */ #define LPS_NACK 0x40 /* printer no ack of data */ #define LPS_NBSY 0x80 /* printer not busy */ #define lpt_control 2 /* Control printer (R/W) */ #define LPC_STROBE 0x01 /* strobe data to printer */ #define LPC_AUTOLF 0x02 /* automatic linefeed */ #define LPC_NINIT 0x04 /* initialize printer */ #define LPC_SELECT 0x08 /* printer selected */ #define LPC_IENABLE 0x10 /* printer out of paper */ #define LPT_NPORTS 4
