101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
#ifndef __BBRAM_H_LOADED
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#define __BBRAM_H_LOADED
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/*****************************************************************************
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Copyright © 1993, 1994 Digital Equipment Corporation,
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Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted, provided
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that the copyright notice and this permission notice appear in all copies
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of software and supporting documentation, and that the name of Digital not
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be used in advertising or publicity pertaining to distribution of the software
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without specific, written prior permission. Digital grants this permission
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provided that you prominently mark, as not part of the original, any
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modifications made to this software or documentation.
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Digital Equipment Corporation disclaims all warranties and/or guarantees
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with regard to this software, including all implied warranties of fitness for
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a particular purpose and merchantability, and makes no representations
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regarding the use of, or the results of the use of, the software and
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documentation in terms of correctness, accuracy, reliability, currentness or
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otherwise; and you rely on the software, documentation and results solely at
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your own risk.
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******************************************************************************/
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/*
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* $Id: bbram.h,v 1.1.1.1 1997/10/30 23:27:14 verghese Exp $;
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*/
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/*
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* $Log: bbram.h,v $
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* Revision 1.1.1.1 1997/10/30 23:27:14 verghese
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* current 10/29/97
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*
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* Revision 1.1 1995/06/23 16:13:56 berc
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* Initial revision
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*
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* Revision 1.6 1995/02/10 02:20:00 fdh
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* Added definitions for OSTYPE location in battary backed RAM.
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*
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* Revision 1.5 1994/08/05 20:13:47 fdh
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* Updated Copyright header and RCS $Id: identifier.
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*
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* Revision 1.4 1994/07/11 19:46:38 fdh
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* Remove typecast used on the value set by the BBRAM_READ macro.
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*
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* Revision 1.3 1994/06/22 15:10:20 rusling
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* Fixed up WNT compile warnings.
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*
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* Revision 1.2 1994/06/20 14:18:59 fdh
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* Fixup header file preprocessor #include conditionals.
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*
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* Revision 1.1 1994/03/16 00:13:48 fdh
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* Initial revision
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*
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*/
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/*
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* The TOY clock contains some BBRAM that we can use to
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* store useful stuff. The BBRAM that is available to us
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* is in bytes 14-127.
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*
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* Currently, we use:
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*
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* Bytes Contents
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*
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* 14:18 bootadr + pattern
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* 21:22 rmode + pattern
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* 23:30 default mac address + 2 bytes of checksum.
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*
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* Below some macros and offsets are defined to make programming
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* this area easier.
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*/
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#define BBRAM_BASE 14
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#define BBRAM_READ(offset,value) \
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{ \
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outportb(RTCADDR, BBRAM_BASE + (offset)); \
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(value) = inportb(RTCDATA) & 0xFF; \
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}
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#define BBRAM_WRITE(offset,value) \
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{ \
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outportb(RTCADDR, BBRAM_BASE + (offset)); \
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outportb(RTCDATA, (value) & 0xFF); \
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}
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#define BBRAM_BOOTADR 0
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#define BBRAM_BOOTADR_COOKIE 0xA1
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#define BBRAM_RMODE 7
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#define BBRAM_RMODE_COOKIE 0x1B
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#define BBRAM_MACADDR 9
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#define BBRAM_MACADDR_COOKIE 0x1C
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#define BBRAM_OSTYPE (0x3f-BBRAM_BASE)
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#endif /* __BBRAM_H_LOADED */
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