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 * from: @(#)nec765.h 7.1 (Berkeley) 5/9/91 34 * $Id$ 35 */ 36 37 /* 38 * Nec 765 floppy disc controller definitions 39 */ 40 41 /* Main status register */ 42 #define NE7_DAB 0x01 /* Diskette drive A is seeking, thus busy */ 43 #define NE7_DBB 0x02 /* Diskette drive B is seeking, thus busy */ 44 #define NE7_CB 0x10 /* Diskette Controller Busy */ 45 #define NE7_NDM 0x20 /* Diskette Controller in Non Dma Mode */ 46 #define NE7_DIO 0x40 /* Diskette Controller Data register I/O */ 47 #define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */ 48 49 /* Status register ST0 */ 50 #define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005drv_chck\004drive_rdy\003top_head" 51 52 /* Status register ST1 */ 53 #define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am" 54 55 /* Status register ST2 */ 56 #define NE7_ST2BITS "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam" 57 58 /* Status register ST3 */ 59 #define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002" 60 61 /* Commands */ 62 #define NE7CMD_SPECIFY 3 /* specify drive parameters - requires unit 63 parameters byte */ 64 #define NE7CMD_SENSED 4 /* sense drive - requires unit select byte */ 65 #define NE7CMD_WRITE 0xc5 /* write - requires eight additional bytes */ 66 #define NE7CMD_READ 0xe6 /* read - requires eight additional bytes */ 67 #define NE7CMD_FORMAT 0x4c /* format - requires five additional bytes */ 68 #define NE7CMD_RECAL 7 /* recalibrate drive - requires 69 unit select byte */ 70 #define NE7CMD_SENSEI 8 /* sense controller interrupt status */ 71 #define NE7CMD_SEEK 15 /* seek drive - requires unit select byte 72 and new cyl byte */ 73