/*
 * TM11 controller registers
 */
struct	tmdevice	{
	u_short	tmer;		/* error register, per drive */
	u_short	tmcs;		/* control-status register */
	short	tmbc;		/* byte/frame count */
	caddr_t	tmba;		/* address */
	short	tmdb;		/* data buffer */
	short	tmrd;		/* read lines */
	short	tmmr;		/* maintenance register */
};

#define	b_repcnt	b_bcount
#define	b_command	b_resid

/* bits in tmcs */
#define	TM_GO		0000001
#define	TM_OFFL		0000000		/* offline */
#define	TM_RCOM		0000002		/* read */
#define	TM_WCOM		0000004		/* write */
#define	TM_WEOF		0000006		/* write-eof */
#define	TM_SFORW	0000010		/* space forward */
#define	TM_SREV		0000012		/* space backwards */
#define	TM_WIRG		0000014		/* write with xtra interrecord gap */
#define	TM_REW		0000016		/* rewind */
#define	TM_SENSE	TM_IE		/* sense (internal to driver) */

/* TM_SENSE is a pseudo-op used to get tape status */
#define	TM_IE		0000100		/* interrupt enable */
#define	TM_CUR		0000200		/* control unit is ready */
#define	TM_DCLR		0010000		/* drive clear */
#define	TM_D800		0060000		/* select 800 bpi density */
#define	TM_ERR		0100000		/* drive error summary */

/* bits in tmer */
#define	TMER_ILC	0100000		/* illegal command */
#define	TMER_EOF	0040000		/* end of file */
#define	TMER_CRE	0020000		/* cyclic redundancy error */
#define	TMER_PAE	0010000		/* parity error */
#define	TMER_BGL	0004000		/* bus grant late */
#define	TMER_EOT	0002000		/* at end of tape */
#define	TMER_RLE	0001000		/* record length error */
#define	TMER_BTE	0000400		/* bad tape error */
#define	TMER_NXM	0000200		/* non-existent memory */
#define	TMER_SELR	0000100		/* tape unit properly selected */
#define	TMER_BOT	0000040		/* at beginning of tape */
#define	TMER_CH7	0000020		/* 7 channel tape */
#define	TMER_SDWN	0000010		/* gap settling down */
#define	TMER_WRL	0000004		/* tape unit write protected */
#define	TMER_RWS	0000002		/* tape unit rewinding */
#define	TMER_TUR	0000001		/* tape unit ready */

#define	TMER_BITS	\
"\10\20ILC\17EOF\16CRE\15PAE\14BGL\13EOT\12RLE\11BTE\10NXM\
\7SELR\6BOT\5CH7\4SDWN\3WRL\2RWS\1TUR"

#define	TMER_HARD	(TMER_ILC|TMER_EOT|TMER_NXM)
#define	TMER_SOFT	(TMER_CRE|TMER_PAE|TMER_BGL|TMER_RLE|TMER_BTE)