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34 lines
1.0 KiB
C
34 lines
1.0 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* form: @(#)lptreg.h 1.1 (Berkeley) 12/19/90
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* $Id$
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*/
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/*
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* AT Parallel Port (for lineprinter)
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* Interface port and bit definitions
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* Written by William Jolitz 12/18/90
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* Copyright (C) William Jolitz 1990
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*/
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#define lpt_data 0 /* Data to/from printer (R/W) */
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#define lpt_status 1 /* Status of printer (R) */
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#define LPS_NERR 0x08 /* printer no error */
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#define LPS_SEL 0x10 /* printer selected */
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#define LPS_OUT 0x20 /* printer out of paper */
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#define LPS_NACK 0x40 /* printer no ack of data */
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#define LPS_NBSY 0x80 /* printer no ack of data */
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#define lpt_control 2 /* Control printer (R/W) */
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#define LPC_STB 0x01 /* strobe data to printer */
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#define LPC_AUTOL 0x02 /* automatic linefeed */
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#define LPC_NINIT 0x04 /* initialize printer */
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#define LPC_SEL 0x08 /* printer selected */
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#define LPC_ENA 0x10 /* printer out of paper */
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