sys/dev/ic/nec765reg.h

   1 /*      $NetBSD: nec765reg.h,v 1.5.2.3 2004/09/21 13:28:05 skrll 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 */