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Annotation of Net2/arch/i386/isa/ic/nec765.h, revision 1.1.1.1

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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