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 | |