usr/src/sys/vax/uba/uureg.h


/*      uureg.h 4.2     83/04/09        */

/*
 * DL11-E/DL11-W UNIBUS (for TU58) controller registers
 */
struct uudevice {
        short   uurcs;  /* receiver status register */
        short   uurdb;  /* receiver data buffer register */
        short   uutcs;  /* transmitter status register */
        short   uutdb;  /* transmitter data buffer register */
};

/*
 * Receiver status register status/command bits
 */
#define UURCS_DONE      0x80    /* Receiver done (byte ready) */
#define UURCS_INTR      0x40    /* Receiver interrupt enable */

/*
 * Receiver data buffer register status bits
 */
#define UURDB_ERROR     0x8000  /* Error (overrun or break) */
#define UURDB_ORUN      0x4000  /* Data overrun error */
#define UURDB_BREAK     0x2000  /* TU58 break */

/*
 * Transmitter status register status/command bits
 */
#define UUTCS_READY     0x80    /* transmitter ready */
#define UUTCS_INTR      0x40    /* transmitter interrupt enable */
#define UUTCS_MAINT     0x02    /* maintenance check */
#define UUTCS_BREAK     0x01    /* send break */

#define UUDB_DMASK      0x00ff  /* data mask (send and receive data) */