sys/arch/sandpoint/isa/nvram.h

   1 /*      $NetBSD: nvram.h,v 1.1.26.3 2004/09/21 13:21:08 skrll Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * William Jolitz.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)rtc.h       8.1 (Berkeley) 6/11/93
  35  */
  36
  37 /*
  38  * The following information is found in the non-volatile RAM in the
  39  * MC146818A (or DS1287A or other compatible) RTC on AT-compatible PCs.
  40  */
  41
  42 /* NVRAM byte 0: bios diagnostic */
  43 #define NVRAM_DIAG      (MC_NVRAM_START + 0)    /* RTC offset 0xe */
  44
  45 #define NVRAM_DIAG_BITS         "\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time"
  46
  47 /* NVRAM byte 1: reset code */
  48 #define NVRAM_RESET     (MC_NVRAM_START + 1)    /* RTC offset 0xf */
  49
  50 #define NVRAM_RESET_RST         0x00            /* normal reset */
  51 #define NVRAM_RESET_LOAD        0x04            /* load system */
  52
  53 /* NVRAM byte 2: diskette drive type in upper/lower nibble */
  54 #define NVRAM_DISKETTE  (MC_NVRAM_START + 2)    /* RTC offset 0x10 */
  55
  56 #define NVRAM_DISKETTE_NONE      0              /* none present */
  57 #define NVRAM_DISKETTE_360K      0x10           /* 360K */
  58 #define NVRAM_DISKETTE_12M       0x20           /* 1.2M */
  59 #define NVRAM_DISKETTE_720K      0x30           /* 720K */
  60 #define NVRAM_DISKETTE_144M      0x40           /* 1.44M */
  61 #define NVRAM_DISKETTE_TYPE5     0x50           /* 2.88M, presumably */
  62 #define NVRAM_DISKETTE_TYPE6     0x60           /* 2.88M */
  63
  64 /* NVRAM byte 6: equipment type */
  65 #define NVRAM_EQUIPMENT (MC_NVRAM_START + 6)
  66
  67 #define NVRAM_EQUIPMENT_EGAVGA  0x00            /* EGA or VGA */
  68 #define NVRAM_EQUIPMENT_COLOR40 0x10            /* 40 column color */
  69 #define NVRAM_EQUIPMENT_COLOR80 0x20            /* 80 column color */
  70 #define NVRAM_EQUIPMENT_MONO80  0x30            /* 80 column mono */
  71 #define NVRAM_EQUIPMENT_MONITOR 0x30            /* mask for monitor type */
  72
  73 /* NVRAM bytes 7 & 8: base memory size */
  74 #define NVRAM_BASELO    (MC_NVRAM_START + 7)    /* low byte; RTC off. 0x15 */
  75 #define NVRAM_BASEHI    (MC_NVRAM_START + 8)    /* high byte; RTC off. 0x16 */
  76
  77 /* NVRAM bytes 9 & 10: extended memory size */
  78 #define NVRAM_EXTLO     (MC_NVRAM_START + 9)    /* low byte; RTC off. 0x17 */
  79 #define NVRAM_EXTHI     (MC_NVRAM_START + 10)   /* high byte; RTC off. 0x18 */
  80
  81 /* NVRAM byte 36: current century.  (please increment in Dec99!) */
  82 #define NVRAM_CENTURY   (MC_NVRAM_START + 36)   /* RTC offset 0x32 */