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      1 /*	$NetBSD: lptreg.h,v 1.10 2006/05/02 08:31:02 martin 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