FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/lptreg.h
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 * form: @(#)lptreg.h 1.1 (Berkeley) 12/19/90
9 * $FreeBSD: releng/5.3/sys/i386/isa/lptreg.h 50477 1999-08-28 01:08:13Z peter $
10 */
11
12 /*
13 * AT Parallel Port (for lineprinter)
14 * Interface port and bit definitions
15 * Written by William Jolitz 12/18/90
16 * Copyright (C) William Jolitz 1990
17 */
18
19 /*
20 * modified for PC9801 by A.Kojima
21 * Kyoto University Microcomputer Club (KMC)
22 */
23
24 #ifdef PC98
25 #define lpt_pstb_ctrl (-9) /* PSTB enable control */
26 #define LPC_EN_PSTB 0xc /* PSTB enable */
27 #define LPC_DIS_PSTB 0xd /* PSTB disable */
28
29 #define lpt_data 0 /* Data to/from printer (R/W) */
30
31 #define lpt_status 2 /* Status of printer (R) */
32 #define LPS_NBSY 0x4 /* printer no ack of data */
33
34 #define lpt_control 6 /* Control printer (W) */
35 #define LPC_MODE8255 0x82 /* 8255 mode */
36 #define LPC_IRQ8 0x6 /* IRQ8 active */
37 #define LPC_NIRQ8 0x7 /* IRQ8 inactive */
38 #define LPC_PSTB 0xe /* PSTB active */
39 #define LPC_NPSTB 0xf /* PSTB inactive */
40
41 #else /* IBM-PC */
42 #define lpt_data 0 /* Data to/from printer (R/W) */
43
44 #define lpt_status 1 /* Status of printer (R) */
45 #define LPS_NERR 0x08 /* printer no error */
46 #define LPS_SEL 0x10 /* printer selected */
47 #define LPS_OUT 0x20 /* printer out of paper */
48 #define LPS_NACK 0x40 /* printer no ack of data */
49 #define LPS_NBSY 0x80 /* printer no ack of data */
50
51 #define lpt_control 2 /* Control printer (R/W) */
52 #define LPC_STB 0x01 /* strobe data to printer */
53 #define LPC_AUTOL 0x02 /* automatic linefeed */
54 #define LPC_NINIT 0x04 /* initialize printer */
55 #define LPC_SEL 0x08 /* printer selected */
56 #define LPC_ENA 0x10 /* enable IRQ */
57 #endif
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