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

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)fdreg.h	7.1 (Berkeley) %G%
 */

/*
 * AT floppy controller registers and bitfields
 */

/* 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 */
Commit	Line	Data
d4a75cc0 KB	1	/*-
	2	* Copyright (c) 1991 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* %sccs.include.redist.c%
	6	*
	7	* @(#)fdreg.h 7.1 (Berkeley) %G%
	8	*/
	9
75ead5a5 BJ	10	/*
75ead5a5 BJ	11	* AT floppy controller registers and bitfields
75ead5a5 BJ	12	*/
	13
	14	/* uses NEC765 controller */
	15	#include "../i386/isa/ic/nec765.h"
	16
	17	/* registers */
	18	#define fdout 2 /* Digital Output Register (W) */
	19	#define FDO_FDSEL 0x01 /* floppy device select */
	20	#define FDO_FRST 0x04 /* floppy controller reset */
	21	#define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
	22	#define FDO_MOEN0 0x10 /* motor enable drive 0 */
	23	#define FDO_MOEN1 0x20 /* motor enable drive 1 */
	24
	25	#define fdsts 4 /* NEC 765 Main Status Register (R) */
	26	#define fddata 5 /* NEC 765 Data Register (R/W) */
	27
	28	#define fdctl 7 /* Control Register (W) */
	29	#define FDC_500KBPS 0x00 /* 500KBPS MFM drive transfer rate */
	30	#define FDC_300KBPS 0x01 /* 300KBPS MFM drive transfer rate */
	31	#define FDC_250KBPS 0x02 /* 250KBPS MFM drive transfer rate */
	32	#define FDC_125KBPS 0x03 /* 125KBPS FM drive transfer rate */
	33
	34	#define fdin 7 /* Digital Input Register (R) */
	35	#define FDI_DCHG 0x80 /* diskette has been changed */
	36
	37