1*1beeb2f1Sart /* $OpenBSD: nvram.h,v 1.7 2004/06/09 10:17:10 art Exp $ */ 2df930be7Sderaadt /* $NetBSD: nvram.h,v 1.5 1995/05/05 22:08:43 mycroft Exp $ */ 3df930be7Sderaadt 4df930be7Sderaadt /*- 5df930be7Sderaadt * Copyright (c) 1990, 1993 6df930be7Sderaadt * The Regents of the University of California. All rights reserved. 7df930be7Sderaadt * 8df930be7Sderaadt * This code is derived from software contributed to Berkeley by 9df930be7Sderaadt * William Jolitz. 10df930be7Sderaadt * 11df930be7Sderaadt * Redistribution and use in source and binary forms, with or without 12df930be7Sderaadt * modification, are permitted provided that the following conditions 13df930be7Sderaadt * are met: 14df930be7Sderaadt * 1. Redistributions of source code must retain the above copyright 15df930be7Sderaadt * notice, this list of conditions and the following disclaimer. 16df930be7Sderaadt * 2. Redistributions in binary form must reproduce the above copyright 17df930be7Sderaadt * notice, this list of conditions and the following disclaimer in the 18df930be7Sderaadt * documentation and/or other materials provided with the distribution. 1929295d1cSmillert * 3. Neither the name of the University nor the names of its contributors 20df930be7Sderaadt * may be used to endorse or promote products derived from this software 21df930be7Sderaadt * without specific prior written permission. 22df930be7Sderaadt * 23df930be7Sderaadt * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24df930be7Sderaadt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25df930be7Sderaadt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26df930be7Sderaadt * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27df930be7Sderaadt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28df930be7Sderaadt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29df930be7Sderaadt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30df930be7Sderaadt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31df930be7Sderaadt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32df930be7Sderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33df930be7Sderaadt * SUCH DAMAGE. 34df930be7Sderaadt * 35df930be7Sderaadt * @(#)rtc.h 8.1 (Berkeley) 6/11/93 36df930be7Sderaadt */ 37df930be7Sderaadt 38df930be7Sderaadt /* 39df930be7Sderaadt * The following information is found in the non-volatile RAM in the 40df930be7Sderaadt * MC146818A (or DS1287A or other compatible) RTC on AT-compatible PCs. 41df930be7Sderaadt */ 42df930be7Sderaadt 43df930be7Sderaadt /* NVRAM byte 0: bios diagnostic */ 44df930be7Sderaadt #define NVRAM_DIAG (MC_NVRAM_START + 0) /* RTC offset 0xe */ 45df930be7Sderaadt 46df930be7Sderaadt #define NVRAM_DIAG_BITS "\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time" 47df930be7Sderaadt 48df930be7Sderaadt /* NVRAM byte 1: reset code */ 49df930be7Sderaadt #define NVRAM_RESET (MC_NVRAM_START + 1) /* RTC offset 0xf */ 50df930be7Sderaadt 51df930be7Sderaadt #define NVRAM_RESET_RST 0x00 /* normal reset */ 52df930be7Sderaadt #define NVRAM_RESET_LOAD 0x04 /* load system */ 53*1beeb2f1Sart #define NVRAM_RESET_JUMP 0x0a /* jump through 40:67 */ 54df930be7Sderaadt 55df930be7Sderaadt /* NVRAM byte 2: diskette drive type in upper/lower nibble */ 56df930be7Sderaadt #define NVRAM_DISKETTE (MC_NVRAM_START + 2) /* RTC offset 0x10 */ 57df930be7Sderaadt 58df930be7Sderaadt #define NVRAM_DISKETTE_NONE 0 /* none present */ 59df930be7Sderaadt #define NVRAM_DISKETTE_360K 0x10 /* 360K */ 60df930be7Sderaadt #define NVRAM_DISKETTE_12M 0x20 /* 1.2M */ 61df930be7Sderaadt #define NVRAM_DISKETTE_720K 0x30 /* 720K */ 62df930be7Sderaadt #define NVRAM_DISKETTE_144M 0x40 /* 1.44M */ 63df930be7Sderaadt #define NVRAM_DISKETTE_TYPE5 0x50 /* 2.88M, presumably */ 64df930be7Sderaadt #define NVRAM_DISKETTE_TYPE6 0x60 /* 2.88M */ 65df930be7Sderaadt 66df930be7Sderaadt /* NVRAM byte 6: equipment type */ 67df930be7Sderaadt #define NVRAM_EQUIPMENT (MC_NVRAM_START + 6) 68df930be7Sderaadt 6969c4ee09Smickey #define NVRAM_EQUIPMENT_FLOPPY 0x01 /* floppy installed */ 7069c4ee09Smickey #define NVRAM_EQUIPMENT_FPU 0x02 /* FPU installed */ 7169c4ee09Smickey #define NVRAM_EQUIPMENT_KBD 0x04 /* keyboard installed */ 7269c4ee09Smickey #define NVRAM_EQUIPMENT_DISPLAY 0x08 /* display installed */ 73df930be7Sderaadt #define NVRAM_EQUIPMENT_EGAVGA 0x00 /* EGA or VGA */ 74df930be7Sderaadt #define NVRAM_EQUIPMENT_COLOR40 0x10 /* 40 column color */ 75df930be7Sderaadt #define NVRAM_EQUIPMENT_COLOR80 0x20 /* 80 column color */ 76df930be7Sderaadt #define NVRAM_EQUIPMENT_MONO80 0x30 /* 80 column mono */ 77df930be7Sderaadt #define NVRAM_EQUIPMENT_MONITOR 0x30 /* mask for monitor type */ 7869c4ee09Smickey #define MVRAM_EQUIPMENT_NFDS 0xC0 /* mask for # of floppies */ 79df930be7Sderaadt 80df930be7Sderaadt /* NVRAM bytes 7 & 8: base memory size */ 81df930be7Sderaadt #define NVRAM_BASELO (MC_NVRAM_START + 7) /* low byte; RTC off. 0x15 */ 82df930be7Sderaadt #define NVRAM_BASEHI (MC_NVRAM_START + 8) /* high byte; RTC off. 0x16 */ 83df930be7Sderaadt 84df930be7Sderaadt /* NVRAM bytes 9 & 10: extended memory size */ 85df930be7Sderaadt #define NVRAM_EXTLO (MC_NVRAM_START + 9) /* low byte; RTC off. 0x17 */ 86df930be7Sderaadt #define NVRAM_EXTHI (MC_NVRAM_START + 10) /* high byte; RTC off. 0x18 */ 87df930be7Sderaadt 88a7cc0d11Sdownsj /* NVRAM bytes 34 and 35: extended memory POSTed size */ 89a7cc0d11Sdownsj #define NVRAM_PEXTLO (MC_NVRAM_START + 34) /* low byte; RTC off. 0x30 */ 90a7cc0d11Sdownsj #define NVRAM_PEXTHI (MC_NVRAM_START + 35) /* high byte; RTC off. 0x31 */ 91a7cc0d11Sdownsj 92df930be7Sderaadt /* NVRAM byte 36: current century. (please increment in Dec99!) */ 93df930be7Sderaadt #define NVRAM_CENTURY (MC_NVRAM_START + 36) /* RTC offset 0x32 */ 94