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Annotation of Net2/arch/i386/isa/ic/nec765.h, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1991 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)nec765.h    7.1 (Berkeley) 5/9/91
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * Nec 765 floppy disc controller definitions
        !            38:  */
        !            39: 
        !            40: /* Main status register */
        !            41: #define NE7_DAB        0x01    /* Diskette drive A is seeking, thus busy */
        !            42: #define NE7_DBB        0x02    /* Diskette drive B is seeking, thus busy */
        !            43: #define NE7_CB 0x10    /* Diskette Controller Busy */
        !            44: #define NE7_NDM        0x20    /* Diskette Controller in Non Dma Mode */
        !            45: #define NE7_DIO        0x40    /* Diskette Controller Data register I/O */
        !            46: #define NE7_RQM        0x80    /* Diskette Controller ReQuest for Master */
        !            47: 
        !            48: /* Status register ST0 */
        !            49: #define NE7_ST0BITS    "\020\010invalid\007abnormal\006seek complete\005drive check\004drive_rdy\003top head\002unit_sel1\001unit_sel0"
        !            50: 
        !            51: /* Status register ST1 */
        !            52: #define NE7_ST1BITS    "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am"
        !            53: 
        !            54: /* Status register ST2 */
        !            55: #define NE7_ST2BITS    "\020\007control_mark\006bad_crc\005wrong_cyl\004scan_equal\003scan_not_found\002bad_cyl\001no_dam"
        !            56: 
        !            57: /* Status register ST3 */
        !            58: #define NE7_ST3BITS    "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002unit_sel1\0012unit_sel0"
        !            59: 
        !            60: /* Commands */
        !            61: #define NE7CMD_SENSED  2       /*  sense drive - requires unit select byte */
        !            62: #define NE7CMD_SPECIFY 3       /*  specify drive parameters - requires unit
        !            63:                                        parameters byte */
        !            64: #define NE7CMD_WRITE   5       /*  write - requires eight additional bytes */
        !            65: #define NE7CMD_READ    6       /*  read - requires eight additional bytes */
        !            66: #define NE7CMD_RECAL   7       /*  recalibrate drive - requires
        !            67:                                        unit select byte */
        !            68: #define NE7CMD_SENSEI  8       /*  sense controller interrupt status */
        !            69: #define NE7CMD_SEEK    15      /*  seek drive - requires unit select byte
        !            70:                                        and new cyl byte */

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