xref: /csrg-svn/sys/vax/if/if_dmc.h (revision 17219)

/*	if_dmc.h	6.2	84/09/26	*/

/*
 * DMC-11 Interface
 */

struct dmcdevice {
	union {
		char	b[8];
		short	w[4];
	} un;
};

#define	bsel0	un.b[0]
#define	bsel1	un.b[1]
#define	bsel2	un.b[2]
#define	bsel3	un.b[3]
#define	bsel4	un.b[4]
#define	bsel5	un.b[5]
#define	bsel6	un.b[6]
#define	bsel7	un.b[7]
#define	sel0	un.w[0]
#define	sel2	un.w[1]
#define	sel4	un.w[2]
#define	sel6	un.w[3]

#define	DMCMTU	(1024)

#define	RDYSCAN	16	/* loop delay for RDYI after RQI */

/* defines for bsel0 */
#define	DMC_BACCI	0
#define	DMC_CNTLI	1
#define	DMC_PERR	2
#define	DMC_BASEI	3
#define	DMC_WRITE	0		/* transmit block */
#define	DMC_READ	4		/* read block */
#define	DMC_RQI		0040		/* port request bit */
#define	DMC_IEI		0100		/* enable input interrupts */
#define	DMC_RDYI	0200		/* port ready */
#define	DMC0BITS	"\10\8RDI\7IEI\6RQI"

/* defines for bsel1 */
#define	DMC_MCLR	0100		/* DMC11 Master Clear */
#define	DMC_RUN		0200		/* clock running */
#define	DMC1BITS	"\10\8RUN\7MCLR"

/* defines for bsel2 */
#define	DMC_BACCO	0
#define	DMC_CNTLO	1
#define	DMC_OUX		0		/* transmit block */
#define	DMC_OUR		4		/* read block */
#define	DMC_IEO		0100		/* enable output interrupts */
#define	DMC_RDYO	0200		/* port available */
#define	DMC2BITS	"\10\8RDO\7IEO"

/* defines for CNTLI mode */
#define	DMC_HDPLX	02000		/* half duplex DDCMP operation */
#define	DMC_SEC		04000		/* half duplex secondary station */
#define	DMC_MAINT	00400		/* enter maintenance mode */

/* defines for BACCI/O and BASEI mode */
#define	DMC_XMEM	0140000		/* xmem bit position */
#define	DMC_CCOUNT	0037777		/* character count mask */
#define	DMC_RESUME	0002000		/* resume (BASEI only) */

/* defines for CNTLO */
#define	DMC_CNTMASK	01777

#define	DMC_DATACK	01
#define	DMC_TIMEOUT	02
#define	DMC_NOBUFS	04
#define	DMC_MAINTREC	010
#define	DMC_LOSTDATA	020
#define	DMC_DISCONN	0100
#define	DMC_START	0200
#define	DMC_NEXMEM	0400
#define	DMC_ERROR	01000

#define	DMC_FATAL (DMC_ERROR|DMC_NEXMEM|DMC_START|DMC_LOSTDATA|DMC_MAINTREC)
#define	CNTLO_BITS	\
   "\10\12ERROR\11NEXMEM\10START\7DISC\5LSTDATA\4MAINT\3NOBUF\2TIMEO\1DATACK"