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