Return to nvram.h CVS log

Up to [local] / sys / arch / i386 / isa

Annotation of sys/arch/i386/isa/nvram.h, Revision 1.1.1.1

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 */