1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * %sccs.include.noredist.c% 9 * 10 * @(#)lptreg.h 1.1 (Berkeley) 12/19/90 11 */ 12 13 /* 14 * AT Parallel Port (for lineprinter) 15 * Interface port and bit definitions 16 * Written by William Jolitz 12/18/90 17 * Copyright (C) William Jolitz 1990 18 */ 19 20 #define lpt_data 0 /* Data to/from printer (R/W) */ 21 22 #define lpt_status 1 /* Status of printer (R) */ 23 #define LPS_NERR 0x08 /* printer no error */ 24 #define LPS_SEL 0x10 /* printer selected */ 25 #define LPS_OUT 0x20 /* printer out of paper */ 26 #define LPS_NACK 0x40 /* printer no ack of data */ 27 #define LPS_NBSY 0x80 /* printer no ack of data */ 28 29 #define lpt_control 2 /* Control printer (R/W) */ 30 #define LPC_STB 0x01 /* strobe data to printer */ 31 #define LPC_AUTOL 0x02 /* automatic linefeed */ 32 #define LPC_NINIT 0x04 /* initialize printer */ 33 #define LPC_SEL 0x08 /* printer selected */ 34 #define LPC_ENA 0x10 /* printer out of paper */ 35