72 lines
3.4 KiB
C
72 lines
3.4 KiB
C
/*-
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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 0x4c /* 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 */
|