usr/src/sys/i386/isa/ic/ns16450.h

/*-
 * Copyright (c) 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)ns16450.h   8.1 (Berkeley) %G%
 */

/*
 * NS16450 UART registers
 */

#define com_data        0       /* data register (R/W) */
#define com_dlbl        0       /* divisor latch low (W) */
#define com_dlbh        1       /* divisor latch high (W) */
#define com_ier         1       /* interrupt enable (W) */
#define com_iir         2       /* interrupt identification (R) */
#define com_lctl        3       /* line control register (R/W) */
#define  com_cfcr       3       /* line control register (R/W) */
#define com_mcr         4       /* modem control register (R/W) */
#define com_lsr         5       /* line status register (R/W) */
#define com_msr         6       /* modem status register (R/W) */