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Annotation of Net2/arch/i386/isa/fdreg.h, revision 1.1.1.1

1.1       root        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:  *
                     33:  *     @(#)fdreg.h     7.1 (Berkeley) 5/9/91
                     34:  */
                     35: 
                     36: /*
                     37:  * AT floppy controller registers and bitfields
                     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: 

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