projects / unix-history / blame
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|---|---|---|
| af359dea C |
1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| c0567266 KB |
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. | |
| af359dea C |
32 | * |
| 33 | * @(#)fdreg.h 7.1 (Berkeley) 5/9/91 | |
| 34 | */ | |
| 35 | ||
| 75ead5a5 BJ |
36 | /* |
| 37 | * AT floppy controller registers and bitfields | |
| 75ead5a5 BJ |
38 | */ |
| 39 | ||
| 40 | /* uses NEC765 controller */ | |
| 41 | #include "../i386/isa/ic/nec765.h" | |
| 42 | ||
| 43 | /* registers */ | |
| 44 | #define fdout 2 /* Digital Output Register (W) */ | |
| 45 | #define FDO_FDSEL 0x01 /* floppy device select */ | |
| 46 | #define FDO_FRST 0x04 /* floppy controller reset */ | |
| 47 | #define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */ | |
| 48 | #define FDO_MOEN0 0x10 /* motor enable drive 0 */ | |
| 49 | #define FDO_MOEN1 0x20 /* motor enable drive 1 */ | |
| 50 | ||
| 51 | #define fdsts 4 /* NEC 765 Main Status Register (R) */ | |
| 52 | #define fddata 5 /* NEC 765 Data Register (R/W) */ | |
| 53 | ||
| 54 | #define fdctl 7 /* Control Register (W) */ | |
| 55 | #define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */ | |
| 56 | #define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */ | |
| 57 | #define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */ | |
| 58 | #define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */ | |
| 59 | ||
| 60 | #define fdin 7 /* Digital Input Register (R) */ | |
| 61 | #define FDI_DCHG 0x80 /* diskette has been changed */ | |
| 62 | ||
| 63 |