1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)ns16450.h 8.1 (Berkeley) 06/11/93 8 */ 9 10 /* 11 * NS16450 UART registers 12 */ 13 14 #define com_data 0 /* data register (R/W) */ 15 #define com_dlbl 0 /* divisor latch low (W) */ 16 #define com_dlbh 1 /* divisor latch high (W) */ 17 #define com_ier 1 /* interrupt enable (W) */ 18 #define com_iir 2 /* interrupt identification (R) */ 19 #define com_lctl 3 /* line control register (R/W) */ 20 #define com_cfcr 3 /* line control register (R/W) */ 21 #define com_mcr 4 /* modem control register (R/W) */ 22 #define com_lsr 5 /* line status register (R/W) */ 23 #define com_msr 6 /* modem status register (R/W) */ 24