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Annotation of 43BSD/sys/vaxif/if_dmc.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)if_dmc.h    7.1 (Berkeley) 6/5/86
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * DMC-11 Interface
        !            11:  */
        !            12: 
        !            13: struct dmcdevice {
        !            14:         char    bsel0;
        !            15:        char    bsel1;
        !            16:        char    bsel2;
        !            17:        char    bsel3;
        !            18:        short   sel4;
        !            19:        short   sel6;
        !            20: };
        !            21: 
        !            22: /*
        !            23:  * dmc software packet encapsulation.  This allows the dmc
        !            24:  * link to be multiplexed among several protocols.
        !            25:  * The first eight bytes of the dmc header are garbage,
        !            26:  * since on a vax the uba has been known to mung these
        !            27:  * bytes.  The next two bytes encapsulate packet type.
        !            28:  */
        !            29: struct dmc_header {
        !            30:        char    dmc_buf[8];     /* space for uba on vax */
        !            31:        short   dmc_type;       /* encapsulate packet type */
        !            32: };
        !            33: 
        !            34: /* packet types */
        !            35: #define        DMC_IPTYPE      1
        !            36: #define        DMC_TRAILER     2
        !            37: #define        DMC_NTRAILER    16
        !            38: 
        !            39: /*
        !            40:  * DMCMTU includes space for data (1024) + 
        !            41:  * protocol header (256) + trailer descriptor (4).
        !            42:  * The software link encapsulation header (dmc_header)
        !            43:  * is handled separately.
        !            44:  */
        !            45: #define DMCMTU  1284
        !            46: 
        !            47: #define        RDYSCAN 16      /* loop delay for RDYI after RQI */
        !            48: 
        !            49: /* defines for bsel0 */
        !            50: #define        DMC_BACCI       0
        !            51: #define        DMC_CNTLI       1
        !            52: #define        DMC_PERR        2
        !            53: #define        DMC_BASEI       3
        !            54: #define        DMC_WRITE       0               /* transmit block */
        !            55: #define        DMC_READ        4               /* read block */
        !            56: #define        DMC_RQI         0040            /* port request bit */
        !            57: #define        DMC_IEI         0100            /* enable input interrupts */
        !            58: #define        DMC_RDYI        0200            /* port ready */
        !            59: #define        DMC0BITS        "\10\8RDI\7IEI\6RQI"
        !            60: 
        !            61: /* defines for bsel1 */
        !            62: #define        DMC_MCLR        0100            /* DMC11 Master Clear */
        !            63: #define        DMC_RUN         0200            /* clock running */
        !            64: #define        DMC1BITS        "\10\8RUN\7MCLR"
        !            65: 
        !            66: /* defines for bsel2 */
        !            67: #define        DMC_BACCO       0
        !            68: #define        DMC_CNTLO       1
        !            69: #define        DMC_OUX         0               /* transmit block */
        !            70: #define        DMC_OUR         4               /* read block */
        !            71: #define        DMC_IEO         0100            /* enable output interrupts */
        !            72: #define        DMC_RDYO        0200            /* port available */
        !            73: #define        DMC2BITS        "\10\8RDO\7IEO"
        !            74: 
        !            75: /* defines for CNTLI mode */
        !            76: #define        DMC_HDPLX       02000           /* half duplex DDCMP operation */
        !            77: #define        DMC_SEC         04000           /* half duplex secondary station */
        !            78: #define        DMC_MAINT       00400           /* enter maintenance mode */
        !            79: 
        !            80: /* defines for BACCI/O and BASEI mode */
        !            81: #define        DMC_XMEM        0140000         /* xmem bit position */
        !            82: #define        DMC_CCOUNT      0037777         /* character count mask */
        !            83: #define        DMC_RESUME      0002000         /* resume (BASEI only) */
        !            84: 
        !            85: /* defines for CNTLO */
        !            86: #define        DMC_CNTMASK     01777
        !            87: 
        !            88: #define        DMC_DATACK      01
        !            89: #define        DMC_TIMEOUT     02
        !            90: #define        DMC_NOBUFS      04
        !            91: #define        DMC_MAINTREC    010
        !            92: #define        DMC_LOSTDATA    020
        !            93: #define        DMC_DISCONN     0100
        !            94: #define        DMC_START       0200
        !            95: #define        DMC_NEXMEM      0400
        !            96: #define        DMC_ERROR       01000
        !            97: 
        !            98: #define        DMC_FATAL (DMC_ERROR|DMC_NEXMEM|DMC_START|DMC_LOSTDATA|DMC_MAINTREC)
        !            99: #define        CNTLO_BITS      \
        !           100:    "\10\12ERROR\11NEXMEM\10START\7DISC\5LSTDATA\4MAINT\3NOBUF\2TIMEO\1DATACK"

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