autoconf, do vga first, fix cursor, update at clock, add atribs

[unix-history] / usr / src / sys / i386 / isa / fdreg.h

/*
* AT floppy controller registers and bitfields
*      @(#)fdreg.h     1.1 (Berkeley) %G%
*/

/* uses NEC765 controller */
#include "../i386/isa/ic/nec765.h"

/* registers */
#define fdout   2       /* Digital Output Register (W) */
#define FDO_FDSEL       0x01    /*  floppy device select */
#define FDO_FRST        0x04    /*  floppy controller reset */
#define FDO_FDMAEN      0x08    /*  enable floppy DMA and Interrupt */
#define FDO_MOEN0       0x10    /*  motor enable drive 0 */
#define FDO_MOEN1       0x20    /*  motor enable drive 1 */

#define fdsts   4       /* NEC 765 Main Status Register (R) */
#define fddata  5       /* NEC 765 Data Register (R/W) */

#define fdctl   7       /* Control Register (W) */
#define FDC_500KBPS     0x00    /* 500KBPS MFM drive transfer rate */
#define FDC_300KBPS     0x01    /* 300KBPS MFM drive transfer rate */
#define FDC_250KBPS     0x02    /* 250KBPS MFM drive transfer rate */
#define FDC_125KBPS     0x03    /* 125KBPS FM drive transfer rate */

#define fdin    7       /* Digital Input Register (R) */
#define FDI_DCHG        0x80    /* diskette has been changed */