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Annotation of xinu/h/slu.h, revision 1.1

1.1     ! root        1: /* slu.h */
        !             2: 
        !             3: /* standard serial line unit device constants */
        !             4: 
        !             5: #define        SLUENABLE       0100            /* device interrupt enable bit  */
        !             6: #define        SLUREADY        0200            /* device ready bit             */
        !             7: #define        SLUDISABLE      0000            /* device interrupt disable mask*/
        !             8: #define        SLUTBREAK       0001            /* transmitter break-mode bit   */
        !             9: #define        SLUERMASK       0170000         /* mask for error flags on input*/
        !            10: #define        SLUCHMASK       0377            /* mask for input character     */
        !            11: 
        !            12: /* SLU device register layout and correspondence to vendor's names     */
        !            13: 
        !            14: struct csr     {
        !            15:        short   crstat;         /* receiver control and status  (RCSR)  */
        !            16:        short   crbuf;          /* receiver data buffer         (RBUF)  */
        !            17:        short   ctstat;         /* transmitter control & status (XCSR)  */
        !            18:        short   ctbuf;          /* transmitter data buffer      (XBUF)  */
        !            19: };

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