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Diffstat (limited to 'sys/i386/isa/lptreg.h')
-rw-r--r-- | sys/i386/isa/lptreg.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/sys/i386/isa/lptreg.h b/sys/i386/isa/lptreg.h new file mode 100644 index 0000000..2605fa0 --- /dev/null +++ b/sys/i386/isa/lptreg.h @@ -0,0 +1,34 @@ +/*- + * 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. + * + * %sccs.include.noredist.c% + * + * @(#)lptreg.h 1.1 (Berkeley) 12/19/90 + */ + +/* + * 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 */ |