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Diffstat (limited to 'i386/i386at/cram.h')
| -rw-r--r-- | i386/i386at/cram.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/i386/i386at/cram.h b/i386/i386at/cram.h new file mode 100644 index 0000000..8373ce0 --- /dev/null +++ b/i386/i386at/cram.h @@ -0,0 +1,75 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * cram.h + */ + +/* + Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc., +Cupertino, California. + + All Rights Reserved + + Permission to use, copy, modify, and distribute this software and +its documentation for any purpose and without fee is hereby +granted, provided that the above copyright notice appears in all +copies and that both the copyright notice and this permission notice +appear in supporting documentation, and that the name of Olivetti +not be used in advertising or publicity pertaining to distribution +of the software without specific, written prior permission. + + OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE +INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, +IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR +CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM +LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, +NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION +WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +/* + * outb(CMOS_ADDR, addr); + * result = inb(CMOS_DATA); + * + * where "addr" tells what value you want to read (some are listed + * below). Interrupts should be disabled while you do this. + */ + +/* I/O ports */ + +#define CMOS_ADDR 0x70 /* port for CMOS ram address */ +#define CMOS_DATA 0x71 /* port for CMOS ram data */ + + +/* Addresses, related masks, and potential results */ + +#define CMOS_EB 0x14 /* read Equipment Byte */ +#define CM_SCRMSK 0x30 /* mask for EB query to get screen */ +#define CM_EGA_VGA 0x00 /* "not CGA or MONO" */ +#define CM_CGA_40 0x10 +#define CM_CGA_80 0x20 +#define CM_MONO_80 0x30 + |