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15637ed4 RG |
1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
d7136515 | 33 | * from: @(#)fdreg.h 7.1 (Berkeley) 5/9/91 |
c2ab4ad1 | 34 | * $Id: fdreg.h,v 1.3 1994/02/07 04:27:10 alm Exp $ |
15637ed4 RG |
35 | */ |
36 | ||
37 | /* | |
38 | * AT floppy controller registers and bitfields | |
39 | */ | |
40 | ||
41 | /* uses NEC765 controller */ | |
42 | #include "../i386/isa/ic/nec765.h" | |
43 | ||
44 | /* registers */ | |
45 | #define fdout 2 /* Digital Output Register (W) */ | |
46 | #define FDO_FDSEL 0x03 /* floppy device select */ | |
47 | #define FDO_FRST 0x04 /* floppy controller reset */ | |
48 | #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */ | |
49 | #define FDO_MOEN0 0x10 /* motor enable drive 0 */ | |
50 | #define FDO_MOEN1 0x20 /* motor enable drive 1 */ | |
51 | #define FDO_MOEN2 0x30 /* motor enable drive 2 */ | |
52 | #define FDO_MOEN3 0x40 /* motor enable drive 3 */ | |
53 | ||
54 | #define fdsts 4 /* NEC 765 Main Status Register (R) */ | |
55 | #define fddata 5 /* NEC 765 Data Register (R/W) */ | |
56 | ||
57 | #define fdctl 7 /* Control Register (W) */ | |
58 | #define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */ | |
59 | #define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */ | |
60 | #define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */ | |
61 | #define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */ | |
62 | ||
63 | #define fdin 7 /* Digital Input Register (R) */ | |
64 | #define FDI_DCHG 0x80 /* diskette has been changed */ | |
65 |