usr/src/sys/vax/if/if_dmc.h

/*      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"