1 /* $NetBSD: nec765reg.h,v 1.4 1995/10/20 00:02:20 pk 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)nec765.h 7.1 (Berkeley) 5/9/91 36 */ 37 38 /* 39 * Nec 765 floppy disc controller definitions 40 */ 41 42 /* Main status register */ 43 #define NE7_DAB 0x01 /* Diskette drive A is seeking, thus busy */ 44 #define NE7_DBB 0x02 /* Diskette drive B is seeking, thus busy */ 45 #define NE7_CB 0x10 /* Diskette Controller Busy */ 46 #define NE7_NDM 0x20 /* Diskette Controller in Non Dma Mode */ 47 #define NE7_DIO 0x40 /* Diskette Controller Data register I/O */ 48 #define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */ 49 50 /* Status register ST0 */ 51 #define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005drv_chck\004drive_rdy\003top_head" 52 53 /* Status register ST1 */ 54 #define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am" 55 56 /* Status register ST2 */ 57 #define NE7_ST2BITS "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam" 58 59 /* Status register ST3 */ 60 #define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002" 61 62 /* Commands */ 63 #define NE7CMD_SPECIFY 3 /* specify drive parameters - requires unit 64 parameters byte */ 65 #define NE7CMD_SENSED 4 /* sense drive - requires unit select byte */ 66 #define NE7CMD_WRITE 0xc5 /* write - requires eight additional bytes */ 67 #define NE7CMD_READ 0xe6 /* read - requires eight additional bytes */ 68 #define NE7CMD_FORMAT 0x4d /* format - requires five additional bytes */ 69 #define NE7CMD_RECAL 7 /* recalibrate drive - requires 70 unit select byte */ 71 #define NE7CMD_SENSEI 8 /* sense controller interrupt status */ 72 #define NE7CMD_SEEK 15 /* seek drive - requires unit select byte 73 and new cyl byte */ 74