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Annotation of sys/arch/i386/isa/nvram.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: nvram.h,v 1.7 2004/06/09 10:17:10 art Exp $   */
        !             2: /*     $NetBSD: nvram.h,v 1.5 1995/05/05 22:08:43 mycroft Exp $        */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1990, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to Berkeley by
        !             9:  * William Jolitz.
        !            10:  *
        !            11:  * Redistribution and use in source and binary forms, with or without
        !            12:  * modification, are permitted provided that the following conditions
        !            13:  * are met:
        !            14:  * 1. Redistributions of source code must retain the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer.
        !            16:  * 2. Redistributions in binary form must reproduce the above copyright
        !            17:  *    notice, this list of conditions and the following disclaimer in the
        !            18:  *    documentation and/or other materials provided with the distribution.
        !            19:  * 3. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  *
        !            35:  *     @(#)rtc.h       8.1 (Berkeley) 6/11/93
        !            36:  */
        !            37:
        !            38: /*
        !            39:  * The following information is found in the non-volatile RAM in the
        !            40:  * MC146818A (or DS1287A or other compatible) RTC on AT-compatible PCs.
        !            41:  */
        !            42:
        !            43: /* NVRAM byte 0: bios diagnostic */
        !            44: #define NVRAM_DIAG     (MC_NVRAM_START + 0)    /* RTC offset 0xe */
        !            45:
        !            46: #define NVRAM_DIAG_BITS                "\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time"
        !            47:
        !            48: /* NVRAM byte 1: reset code */
        !            49: #define NVRAM_RESET    (MC_NVRAM_START + 1)    /* RTC offset 0xf */
        !            50:
        !            51: #define        NVRAM_RESET_RST         0x00            /* normal reset */
        !            52: #define        NVRAM_RESET_LOAD        0x04            /* load system */
        !            53: #define        NVRAM_RESET_JUMP        0x0a            /* jump through 40:67 */
        !            54:
        !            55: /* NVRAM byte 2: diskette drive type in upper/lower nibble */
        !            56: #define NVRAM_DISKETTE (MC_NVRAM_START + 2)    /* RTC offset 0x10 */
        !            57:
        !            58: #define        NVRAM_DISKETTE_NONE      0              /* none present */
        !            59: #define        NVRAM_DISKETTE_360K      0x10           /* 360K */
        !            60: #define        NVRAM_DISKETTE_12M       0x20           /* 1.2M */
        !            61: #define        NVRAM_DISKETTE_720K      0x30           /* 720K */
        !            62: #define        NVRAM_DISKETTE_144M      0x40           /* 1.44M */
        !            63: #define        NVRAM_DISKETTE_TYPE5     0x50           /* 2.88M, presumably */
        !            64: #define        NVRAM_DISKETTE_TYPE6     0x60           /* 2.88M */
        !            65:
        !            66: /* NVRAM byte 6: equipment type */
        !            67: #define        NVRAM_EQUIPMENT (MC_NVRAM_START + 6)
        !            68:
        !            69: #define        NVRAM_EQUIPMENT_FLOPPY  0x01            /* floppy installed */
        !            70: #define        NVRAM_EQUIPMENT_FPU     0x02            /* FPU installed */
        !            71: #define        NVRAM_EQUIPMENT_KBD     0x04            /* keyboard installed */
        !            72: #define        NVRAM_EQUIPMENT_DISPLAY 0x08            /* display installed */
        !            73: #define        NVRAM_EQUIPMENT_EGAVGA  0x00            /* EGA or VGA */
        !            74: #define        NVRAM_EQUIPMENT_COLOR40 0x10            /* 40 column color */
        !            75: #define        NVRAM_EQUIPMENT_COLOR80 0x20            /* 80 column color */
        !            76: #define        NVRAM_EQUIPMENT_MONO80  0x30            /* 80 column mono */
        !            77: #define        NVRAM_EQUIPMENT_MONITOR 0x30            /* mask for monitor type */
        !            78: #define        MVRAM_EQUIPMENT_NFDS    0xC0            /* mask for # of floppies */
        !            79:
        !            80: /* NVRAM bytes 7 & 8: base memory size */
        !            81: #define NVRAM_BASELO   (MC_NVRAM_START + 7)    /* low byte; RTC off. 0x15 */
        !            82: #define NVRAM_BASEHI   (MC_NVRAM_START + 8)    /* high byte; RTC off. 0x16 */
        !            83:
        !            84: /* NVRAM bytes 9 & 10: extended memory size */
        !            85: #define NVRAM_EXTLO    (MC_NVRAM_START + 9)    /* low byte; RTC off. 0x17 */
        !            86: #define NVRAM_EXTHI    (MC_NVRAM_START + 10)   /* high byte; RTC off. 0x18 */
        !            87:
        !            88: /* NVRAM bytes 34 and 35: extended memory POSTed size */
        !            89: #define NVRAM_PEXTLO   (MC_NVRAM_START + 34)   /* low byte; RTC off. 0x30 */
        !            90: #define NVRAM_PEXTHI   (MC_NVRAM_START + 35)   /* high byte; RTC off. 0x31 */
        !            91:
        !            92: /* NVRAM byte 36: current century.  (please increment in Dec99!) */
        !            93: #define NVRAM_CENTURY  (MC_NVRAM_START + 36)   /* RTC offset 0x32 */