/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)ns16550.h	7.1 (Berkeley) 05/09/91
 */

/*
 * NS16550 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_fifo	2	/* FIFO control (W) */
#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) */