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Annotation of 42BSD/sys/vaxif/if_unreg.h, revision 1.1

1.1     ! root        1: /*     if_unreg.h      6.1     83/07/29        */
        !             2: 
        !             3: /*
        !             4:  * Device registers and bit meanings
        !             5:  */
        !             6: 
        !             7: struct undevice {
        !             8:        short   wcr;    /* word count */
        !             9:        short   bar;    /* bus address */
        !            10:        short   csr;    /* control & status (also error & info) */
        !            11:        short   dar;    /* input and output data register */
        !            12: };
        !            13: 
        !            14: /* CSR bits */
        !            15: #define GO     0000001
        !            16: #define FCN1   0000002         /* three function bits */
        !            17: #define FCN2   0000004 
        !            18: #define FCN3   0000010 
        !            19: #define XBA    0000060         /* extended bus address (16&17) */
        !            20: #define IE     0000100         /* interrupt enable */
        !            21: #define RDY    0000200         /* ready */
        !            22: #define CYCL   0000400         /* cycle */
        !            23: #define        STATC   0001000         /* Status bit C */
        !            24: #define        STATB   0002000         /* Status bit B */
        !            25: #define        STATA   0004000         /* Status bit A */
        !            26: #define MNT    0010000         /* maintenance */
        !            27: #define ATTN   0020000         /* attention (from device) */
        !            28: #define NEX    0040000         /* non-existent memory */
        !            29: #define ERR    0100000
        !            30: #define XADD   4
        !            31: 
        !            32: #define        UNBITS  "\10\20ERR\17NEX\16ATTN\15MNT\14STATA\13STATB\12STATC\
        !            33: \11CYCL\10RDY\7IE\6XBA17\5XBA16\4FCN3\3FCN2\2FCN1\1GO"
        !            34: 
        !            35: /* EIR bits */
        !            36: #define RF     0000001         /* register flag 1 - verifies EIR */
        !            37: #define NBST   0000400         /* N - cycle burst */
        !            38: #define BDLT   0001000         /* burst data late */
        !            39: #define PERR   0002000         /* parity error */
        !            40: #define ACLO   0004000         /* power fail */
        !            41: #define MCYC   0010000         /* multicycle request */
        !            42: #define ATTN   0020000         /* attention (from device) */
        !            43: #define NEX    0040000         /* non-existent memory */
        !            44: #define ERR    0100000
        !            45: 
        !            46: /* Network interface commands */
        !            47: #define        UNRESET 0
        !            48: #define        UNRDHDR FCN1
        !            49: #define        UNOUT   FCN2
        !            50: #define        UNRDDG  (FCN2|FCN1)
        !            51: #define        UNFLUSH FCN3
        !            52: #define        UNIDLE  (FCN3|FCN2)
        !            53: 
        !            54: /* Extended status bits (in dar) */
        !            55: #define RESETACK       1       /* Reset cmd acknowledged */

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