sys/i386/isa/lptreg.h

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 *      form: @(#)lptreg.h      1.1 (Berkeley) 12/19/90
 *      $Id$
 */

/*
 * AT Parallel Port (for lineprinter)
 * Interface port and bit definitions
 * Written by William Jolitz 12/18/90
 * Copyright (C) William Jolitz 1990
 */

#define lpt_data        0       /* Data to/from printer (R/W) */

#define lpt_status      1       /* Status of printer (R) */
#define LPS_NERR                0x08    /* printer no error */
#define LPS_SEL                 0x10    /* printer selected */
#define LPS_OUT                 0x20    /* printer out of paper */
#define LPS_NACK                0x40    /* printer no ack of data */
#define LPS_NBSY                0x80    /* printer no ack of data */

#define lpt_control     2       /* Control printer (R/W) */
#define LPC_STB                 0x01    /* strobe data to printer */
#define LPC_AUTOL               0x02    /* automatic linefeed */
#define LPC_NINIT               0x04    /* initialize printer */
#define LPC_SEL                 0x08    /* printer selected */
#define LPC_ENA                 0x10    /* printer out of paper */