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 */ 70