projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 15637ed4 RG |
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 | * | |
| d7136515 RG |
8 | * form: @(#)lptreg.h 1.1 (Berkeley) 12/19/90 |
| 9 | * $Id$ | |
| 15637ed4 RG |
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 | #define lpt_data 0 /* Data to/from printer (R/W) */ | |
| 20 | ||
| 21 | #define lpt_status 1 /* Status of printer (R) */ | |
| 22 | #define LPS_NERR 0x08 /* printer no error */ | |
| 23 | #define LPS_SEL 0x10 /* printer selected */ | |
| 24 | #define LPS_OUT 0x20 /* printer out of paper */ | |
| 25 | #define LPS_NACK 0x40 /* printer no ack of data */ | |
| 26 | #define LPS_NBSY 0x80 /* printer no ack of data */ | |
| 27 | ||
| 28 | #define lpt_control 2 /* Control printer (R/W) */ | |
| 29 | #define LPC_STB 0x01 /* strobe data to printer */ | |
| 30 | #define LPC_AUTOL 0x02 /* automatic linefeed */ | |
| 31 | #define LPC_NINIT 0x04 /* initialize printer */ | |
| 32 | #define LPC_SEL 0x08 /* printer selected */ | |
| 33 | #define LPC_ENA 0x10 /* printer out of paper */ |