lptreg.h Source File

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lptreg.h
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1 /* $NetBSD: lptreg.h,v 1.8 2005/02/27 00:27:02 perry Exp $ */
2 
3 #ifndef LPTREG_H
4 #define LPTREG_H
5 
6 /*-
7  * Copyright (c) 1990 The Regents of the University of California.
8  * All rights reserved.
9  *
10  * This code is derived from software contributed to Berkeley by
11  * William Jolitz.
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  * 1. Redistributions of source code must retain the above copyright
17  * notice, this list of conditions and the following disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
19  * notice, this list of conditions and the following disclaimer in the
20  * documentation and/or other materials provided with the distribution.
21  * 3. Neither the name of the University nor the names of its contributors
22  * may be used to endorse or promote products derived from this software
23  * without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  * @(#)lptreg.h 1.1 (Berkeley) 12/19/90
38  */
39 
40 /*
41  * AT Parallel Port (for lineprinter)
42  * Interface port and bit definitions
43  * Written by William Jolitz 12/18/90
44  * Copyright (C) William Jolitz 1990
45  */
46 
47 /*
48  * On a standard DB25 parallel port, the bits show up as follows:
49  *
50  * 13 12 11 10 9 8 7 6 5 4 3 2 1
51  * ~S7 S6 S5 S4 D7 D6 D5 D4 D3 D2 D1 D0 ~C0
52  *
53  * G G G G G G G G ~C3 C2 S3 ~C1
54  * 25 24 23 22 21 20 19 18 17 16 15 14
55  *
56  * D7-D0 are output bits from the data register
57  * S7-S3 are input bits read at the status register
58  * C3-C0 are output bits from the control register
59  */
60 
61 #define LPT_DATA 0 /* Data to/from printer (R/W) */
62 
63 #define LPT_STATUS 1 /* Status of printer (R) */
64 #define LPS_NERR 0x08 /* printer no error */
65 #define LPS_SELECT 0x10 /* printer selected */
66 #define LPS_NOPAPER 0x20 /* printer out of paper */
67 #define LPS_NACK 0x40 /* printer no ack of data */
68 #define LPS_NBSY 0x80 /* printer no ack of data */
69 
70 #define LPT_CONTROL 2 /* Control printer (R/W) */
71 #define LPC_STROBE 0x01 /* strobe data to printer */
72 #define LPC_AUTOLF 0x02 /* automatic linefeed */
73 #define LPC_NINIT 0x04 /* initialize printer */
74 #define LPC_SELECT 0x08 /* printer selected */
75 #define LPC_IENABLE 0x10 /* printer out of paper */
76 
77 #define LPT_NPORTS 4
78 
79 #endif /* LPTREG_H */

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