#define INTENA     (WORD *) 0xDFF09A
#define INTREQ     (WORD *) 0xDFF09C
#define INTREQR    (WORD *) 0xDFF01E
# define SET        (1<<15)
# define INTEN      (1<<14)
# define DSKBLK      (1<<1)
# define CLR             0

#define DSKBYTR    (WORD *) 0xDFF01A
# define BYTEREADY  (1<<15)
# define DMAON      (1<<14)
# define DSKWRITE   (1<<13)

#define DSKPT     (WORD **) 0xDFF020
#define DSKLEN     (WORD *) 0xDFF024
# define DMAEN      (1<<15)
# define WRITE      (1<<14)
# define READ            0

#define DSKSYNC    (WORD *) 0xDFF07E
# define SYNC_DATA  0x4489          /* illegal 0xA1 */

#define ADKCON     (WORD *) 0xDFF09E
#define ADKCONR    (WORD *) 0xDFF010
# define PRECOMPMASK (1<<13)|(1<<14)
# define PRECOMP0        0
# define PRECOMP140 (1<<13)
# define MFMPREC    (1<<12)
# define WORDSYNC   (1<<10)
# define MSBSYNC     (1<<9)
# define FAST        (1<<8)

#define DSKBYTR    (WORD *) 0xDFF01A

#define DMACON     (WORD *) 0xDFF096
# define DSKEN       (1<<4)

#define DSKDAT     (WORD *) 0xDFF026