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 */
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