The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/nec765reg.h

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    1 /*      $NetBSD: nec765reg.h,v 1.7 2005/12/11 12:21:28 christos Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 1991 The Regents of the University of California.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)nec765.h    7.1 (Berkeley) 5/9/91
   32  */
   33 
   34 /*
   35  * Nec 765 floppy disc controller definitions
   36  */
   37 
   38 /* Main status register */
   39 #define NE7_DAB 0x01    /* Diskette drive A is seeking, thus busy */
   40 #define NE7_DBB 0x02    /* Diskette drive B is seeking, thus busy */
   41 #define NE7_CB  0x10    /* Diskette Controller Busy */
   42 #define NE7_NDM 0x20    /* Diskette Controller in Non DMA Mode */
   43 #define NE7_DIO 0x40    /* Diskette Controller Data register I/O */
   44 #define NE7_RQM 0x80    /* Diskette Controller ReQuest for Master */
   45 
   46 /* Status register ST0 */
   47 #define NE7_ST0BITS     "\020\010invld\007abnrml\006seek_cmplt\005drv_chck\004drive_rdy\003top_head"
   48 
   49 /* Status register ST1 */
   50 #define NE7_ST1BITS     "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am"
   51 
   52 /* Status register ST2 */
   53 #define NE7_ST2BITS     "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam"
   54 
   55 /* Status register ST3 */
   56 #define NE7_ST3BITS     "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002"
   57 
   58 /* Commands */
   59 #define NE7CMD_SPECIFY  3       /*  specify drive parameters - requires unit
   60                                         parameters byte */
   61 #define NE7CMD_SENSED   4       /*  sense drive - requires unit select byte */
   62 #define NE7CMD_WRITE    0xc5    /*  write - requires eight additional bytes */
   63 #define NE7CMD_READ     0xe6    /*  read - requires eight additional bytes */
   64 #define NE7CMD_FORMAT   0x4d    /*  format - requires five additional bytes */
   65 #define NE7CMD_RECAL    7       /*  recalibrate drive - requires
   66                                         unit select byte */
   67 #define NE7CMD_SENSEI   8       /*  sense controller interrupt status */
   68 #define NE7CMD_SEEK     15      /*  seek drive - requires unit select byte
   69                                         and new cyl byte */

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