usr/src/sys/vaxuba/uureg.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)uureg.h     7.1 (Berkeley) 6/5/86
 */


/*
 * DL11-E/DL11-W UNIBUS (for TU58) controller registers
 */
struct uudevice {
        short   rcs;    /* receiver status register */
        short   rdb;    /* receiver data buffer register */
        short   tcs;    /* transmitter status register */
        short   tdb;    /* transmitter data buffer register */
};

/*
 * Receiver/transmitter status register status/command bits
 */
#define UUCS_DONE       0x80    /* done/ready */
#define UUCS_READY      0x80
#define UUCS_INTR       0x40    /* interrupt enable */
#define UUCS_MAINT      0x02    /* maintenance check (xmitter only) */
#define UUCS_BREAK      0x01    /* send break (xmitter only) */

/*
 * 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 */

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