/* $NetBSD: nec765reg.h,v 1.7 2005/12/11 12:21:28 christos Exp $ */ /*- * Copyright (c) 1991 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)nec765.h 7.1 (Berkeley) 5/9/91 */ /* * Nec 765 floppy disc controller definitions */ /* Main status register */ #define NE7_DAB 0x01 /* Diskette drive A is seeking, thus busy */ #define NE7_DBB 0x02 /* Diskette drive B is seeking, thus busy */ #define NE7_CB 0x10 /* Diskette Controller Busy */ #define NE7_NDM 0x20 /* Diskette Controller in Non DMA Mode */ #define NE7_DIO 0x40 /* Diskette Controller Data register I/O */ #define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */ /* Status register ST0 */ #define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005drv_chck\004drive_rdy\003top_head" /* Status register ST1 */ #define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am" /* Status register ST2 */ #define NE7_ST2BITS "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam" /* Status register ST3 */ #define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002" /* Commands */ #define NE7CMD_SPECIFY 3 /* specify drive parameters - requires unit parameters byte */ #define NE7CMD_SENSED 4 /* sense drive - requires unit select byte */ #define NE7CMD_WRITE 0xc5 /* write - requires eight additional bytes */ #define NE7CMD_READ 0xe6 /* read - requires eight additional bytes */ #define NE7CMD_FORMAT 0x4d /* format - requires five additional bytes */ #define NE7CMD_RECAL 7 /* recalibrate drive - requires unit select byte */ #define NE7CMD_SENSEI 8 /* sense controller interrupt status */ #define NE7CMD_SEEK 15 /* seek drive - requires unit select byte and new cyl byte */ |