1*5be2bff2Sderaadt /* $OpenBSD: nvram.h,v 1.1 2007/08/02 16:40:27 deraadt Exp $ */ 2*5be2bff2Sderaadt /* $NetBSD: nvram.h,v 1.5 1995/05/05 22:08:43 mycroft Exp $ */ 3*5be2bff2Sderaadt 4*5be2bff2Sderaadt /*- 5*5be2bff2Sderaadt * Copyright (c) 1990, 1993 6*5be2bff2Sderaadt * The Regents of the University of California. All rights reserved. 7*5be2bff2Sderaadt * 8*5be2bff2Sderaadt * This code is derived from software contributed to Berkeley by 9*5be2bff2Sderaadt * William Jolitz. 10*5be2bff2Sderaadt * 11*5be2bff2Sderaadt * Redistribution and use in source and binary forms, with or without 12*5be2bff2Sderaadt * modification, are permitted provided that the following conditions 13*5be2bff2Sderaadt * are met: 14*5be2bff2Sderaadt * 1. Redistributions of source code must retain the above copyright 15*5be2bff2Sderaadt * notice, this list of conditions and the following disclaimer. 16*5be2bff2Sderaadt * 2. Redistributions in binary form must reproduce the above copyright 17*5be2bff2Sderaadt * notice, this list of conditions and the following disclaimer in the 18*5be2bff2Sderaadt * documentation and/or other materials provided with the distribution. 19*5be2bff2Sderaadt * 3. Neither the name of the University nor the names of its contributors 20*5be2bff2Sderaadt * may be used to endorse or promote products derived from this software 21*5be2bff2Sderaadt * without specific prior written permission. 22*5be2bff2Sderaadt * 23*5be2bff2Sderaadt * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24*5be2bff2Sderaadt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25*5be2bff2Sderaadt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26*5be2bff2Sderaadt * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27*5be2bff2Sderaadt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28*5be2bff2Sderaadt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29*5be2bff2Sderaadt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30*5be2bff2Sderaadt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31*5be2bff2Sderaadt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32*5be2bff2Sderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33*5be2bff2Sderaadt * SUCH DAMAGE. 34*5be2bff2Sderaadt * 35*5be2bff2Sderaadt * @(#)rtc.h 8.1 (Berkeley) 6/11/93 36*5be2bff2Sderaadt */ 37*5be2bff2Sderaadt 38*5be2bff2Sderaadt /* 39*5be2bff2Sderaadt * The following information is found in the non-volatile RAM in the 40*5be2bff2Sderaadt * MC146818A (or DS1287A or other compatible) RTC on AT-compatible PCs. 41*5be2bff2Sderaadt */ 42*5be2bff2Sderaadt 43*5be2bff2Sderaadt /* NVRAM byte 0: bios diagnostic */ 44*5be2bff2Sderaadt #define NVRAM_DIAG (MC_NVRAM_START + 0) /* RTC offset 0xe */ 45*5be2bff2Sderaadt 46*5be2bff2Sderaadt #define NVRAM_DIAG_BITS "\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time" 47*5be2bff2Sderaadt 48*5be2bff2Sderaadt /* NVRAM byte 1: reset code */ 49*5be2bff2Sderaadt #define NVRAM_RESET (MC_NVRAM_START + 1) /* RTC offset 0xf */ 50*5be2bff2Sderaadt 51*5be2bff2Sderaadt #define NVRAM_RESET_RST 0x00 /* normal reset */ 52*5be2bff2Sderaadt #define NVRAM_RESET_LOAD 0x04 /* load system */ 53*5be2bff2Sderaadt #define NVRAM_RESET_JUMP 0x0a /* jump through 40:67 */ 54*5be2bff2Sderaadt 55*5be2bff2Sderaadt /* NVRAM byte 2: diskette drive type in upper/lower nibble */ 56*5be2bff2Sderaadt #define NVRAM_DISKETTE (MC_NVRAM_START + 2) /* RTC offset 0x10 */ 57*5be2bff2Sderaadt 58*5be2bff2Sderaadt #define NVRAM_DISKETTE_NONE 0 /* none present */ 59*5be2bff2Sderaadt #define NVRAM_DISKETTE_360K 0x10 /* 360K */ 60*5be2bff2Sderaadt #define NVRAM_DISKETTE_12M 0x20 /* 1.2M */ 61*5be2bff2Sderaadt #define NVRAM_DISKETTE_720K 0x30 /* 720K */ 62*5be2bff2Sderaadt #define NVRAM_DISKETTE_144M 0x40 /* 1.44M */ 63*5be2bff2Sderaadt #define NVRAM_DISKETTE_TYPE5 0x50 /* 2.88M, presumably */ 64*5be2bff2Sderaadt #define NVRAM_DISKETTE_TYPE6 0x60 /* 2.88M */ 65*5be2bff2Sderaadt 66*5be2bff2Sderaadt /* NVRAM byte 6: equipment type */ 67*5be2bff2Sderaadt #define NVRAM_EQUIPMENT (MC_NVRAM_START + 6) 68*5be2bff2Sderaadt 69*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_FLOPPY 0x01 /* floppy installed */ 70*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_FPU 0x02 /* FPU installed */ 71*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_KBD 0x04 /* keyboard installed */ 72*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_DISPLAY 0x08 /* display installed */ 73*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_EGAVGA 0x00 /* EGA or VGA */ 74*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_COLOR40 0x10 /* 40 column color */ 75*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_COLOR80 0x20 /* 80 column color */ 76*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_MONO80 0x30 /* 80 column mono */ 77*5be2bff2Sderaadt #define NVRAM_EQUIPMENT_MONITOR 0x30 /* mask for monitor type */ 78*5be2bff2Sderaadt #define MVRAM_EQUIPMENT_NFDS 0xC0 /* mask for # of floppies */ 79*5be2bff2Sderaadt 80*5be2bff2Sderaadt /* NVRAM bytes 7 & 8: base memory size */ 81*5be2bff2Sderaadt #define NVRAM_BASELO (MC_NVRAM_START + 7) /* low byte; RTC off. 0x15 */ 82*5be2bff2Sderaadt #define NVRAM_BASEHI (MC_NVRAM_START + 8) /* high byte; RTC off. 0x16 */ 83*5be2bff2Sderaadt 84*5be2bff2Sderaadt /* NVRAM bytes 9 & 10: extended memory size */ 85*5be2bff2Sderaadt #define NVRAM_EXTLO (MC_NVRAM_START + 9) /* low byte; RTC off. 0x17 */ 86*5be2bff2Sderaadt #define NVRAM_EXTHI (MC_NVRAM_START + 10) /* high byte; RTC off. 0x18 */ 87*5be2bff2Sderaadt 88*5be2bff2Sderaadt /* NVRAM bytes 34 and 35: extended memory POSTed size */ 89*5be2bff2Sderaadt #define NVRAM_PEXTLO (MC_NVRAM_START + 34) /* low byte; RTC off. 0x30 */ 90*5be2bff2Sderaadt #define NVRAM_PEXTHI (MC_NVRAM_START + 35) /* high byte; RTC off. 0x31 */ 91*5be2bff2Sderaadt 92*5be2bff2Sderaadt /* NVRAM byte 36: current century. (please increment in Dec99!) */ 93*5be2bff2Sderaadt #define NVRAM_CENTURY (MC_NVRAM_START + 36) /* RTC offset 0x32 */ 94