usr/src/sys/vaxif/if_dmc.h

/*      if_dmc.h        6.1     83/07/29        */

/*
 * 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  (2048)

#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 */

/* defines for bsel1 */
#define DMC_MCLR        0100            /* DMC11 Master Clear */
#define DMC_RUN         0200            /* clock running */

/* 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 */

/* 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_FATAL       01620