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Annotation of researchv10dc/lsys/sys/up.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * UNIBUS SMD disk data structures
        !             3:  * one updisk per drive
        !             4:  * one scctl per controller
        !             5:  */
        !             6: 
        !             7: struct updisk {
        !             8:        struct scctl *ctl;
        !             9:        char flags;
        !            10:        char type;              /* type of drive; magic code */
        !            11:        char unit;              /* physical unit number on this controller */
        !            12:        struct buf *actf;       /* list of buffers waiting to be xfered */
        !            13:        struct buf *actl;
        !            14:        struct updisk *next;
        !            15: };
        !            16: 
        !            17: #define        NSCUP   8       /* max units per controller */
        !            18: 
        !            19: struct scctl {
        !            20:        struct updevice *addr;
        !            21:        struct updisk *actf;    /* list of active drives */
        !            22:        struct updisk *actl;
        !            23:        char flags;
        !            24:        char ubno;              /* unibus number -- only for mapping */
        !            25:        char errcnt;
        !            26:        char recal;             /* current place in retry machine */
        !            27:        char softas;            /* non-transfer attention required */
        !            28:        struct updisk *drives[NSCUP];   /* back-pointers to drives */
        !            29: };
        !            30: 
        !            31: /*
        !            32:  * device size
        !            33:  * here so updump can get it
        !            34:  */
        !            35: struct upst {
        !            36:        char    nsect;  /* sectors per track */
        !            37:        char    ntrak;  /* tracks per cylinder */
        !            38:        char    sdist;  /* sectors twixt search and io */
        !            39:        char    rdist;  /* sectors close enough not to search */
        !            40:        short   nspc;   /* sectors per cylinder */
        !            41:        short   ncyl;   /* cylinders per pack */
        !            42:        struct  size *sizes;
        !            43: };

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