* Copyright (c) 1991 The Regents of the University of California.
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* @(#)nec765.h 7.1 (Berkeley) 5/9/91
* Nec 765 floppy disc controller definitions
/* Main status register */
#define NE7_DAB 0x01 /* Diskette drive A is seeking, thus busy */
#define NE7_DBB 0x02 /* Diskette drive B is seeking, thus busy */
#define NE7_CB 0x10 /* Diskette Controller Busy */
#define NE7_NDM 0x20 /* Diskette Controller in Non Dma Mode */
#define NE7_DIO 0x40 /* Diskette Controller Data register I/O */
#define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */
/* Status register ST0 */
#define NE7_ST0BITS "\020\010invalid\007abnormal\006seek complete\005drive check\004drive_rdy\003top head\002unit_sel1\001unit_sel0"
/* Status register ST1 */
#define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am"
/* Status register ST2 */
#define NE7_ST2BITS "\020\007control_mark\006bad_crc\005wrong_cyl\004scan_equal\003scan_not_found\002bad_cyl\001no_dam"
/* Status register ST3 */
#define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002unit_sel1\0012unit_sel0"
#define NE7CMD_SENSED 2 /* sense drive - requires unit select byte */
#define NE7CMD_SPECIFY 3 /* specify drive parameters - requires unit
#define NE7CMD_WRITE 5 /* write - requires eight additional bytes */
#define NE7CMD_READ 6 /* read - requires eight additional bytes */
#define NE7CMD_RECAL 7 /* recalibrate drive - requires
#define NE7CMD_SENSEI 8 /* sense controller interrupt status */
#define NE7CMD_SEEK 15 /* seek drive - requires unit select byte
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