2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * form: @(#)lptreg.h 1.1 (Berkeley) 12/19/90
9 * $FreeBSD: src/sys/i386/isa/lptreg.h,v 1.7 1999/08/28 00:44:57 peter Exp $
10 * $DragonFly: src/sys/i386/isa/Attic/lptreg.h,v 1.2 2003/06/17 04:28:37 dillon Exp $
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
21 * modified for PC9801 by A.Kojima
22 * Kyoto University Microcomputer Club (KMC)
26 #define lpt_pstb_ctrl (-9) /* PSTB enable control */
27 #define LPC_EN_PSTB 0xc /* PSTB enable */
28 #define LPC_DIS_PSTB 0xd /* PSTB disable */
30 #define lpt_data 0 /* Data to/from printer (R/W) */
32 #define lpt_status 2 /* Status of printer (R) */
33 #define LPS_NBSY 0x4 /* printer no ack of data */
35 #define lpt_control 6 /* Control printer (W) */
36 #define LPC_MODE8255 0x82 /* 8255 mode */
37 #define LPC_IRQ8 0x6 /* IRQ8 active */
38 #define LPC_NIRQ8 0x7 /* IRQ8 inactive */
39 #define LPC_PSTB 0xe /* PSTB active */
40 #define LPC_NPSTB 0xf /* PSTB inactive */
43 #define lpt_data 0 /* Data to/from printer (R/W) */
45 #define lpt_status 1 /* Status of printer (R) */
46 #define LPS_NERR 0x08 /* printer no error */
47 #define LPS_SEL 0x10 /* printer selected */
48 #define LPS_OUT 0x20 /* printer out of paper */
49 #define LPS_NACK 0x40 /* printer no ack of data */
50 #define LPS_NBSY 0x80 /* printer no ack of data */
52 #define lpt_control 2 /* Control printer (R/W) */
53 #define LPC_STB 0x01 /* strobe data to printer */
54 #define LPC_AUTOL 0x02 /* automatic linefeed */
55 #define LPC_NINIT 0x04 /* initialize printer */
56 #define LPC_SEL 0x08 /* printer selected */
57 #define LPC_ENA 0x10 /* enable IRQ */