1/*
2 * Copyright (c) 1995 Carnegie-Mellon University.
3 * All rights reserved.
4 *
5 * Permission to use, copy, modify and distribute this software and
6 * its documentation is hereby granted, provided that both the copyright
7 * notice and this permission notice appear in all copies of the
8 * software, derivative works or modified versions, and any portions
--- 7 unchanged lines hidden (view full) ---
16 *
17 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
18 * School of Computer Science
19 * Carnegie Mellon University
20 * Pittsburgh PA 15213-3890
21 *
22 * any improvements or extensions that they make and grant Carnegie the
23 * rights to redistribute these changes.
24 *
25 * from: NetBSD: mc146818reg.h,v 1.5 2003/11/02 11:07:45 wiz Exp
26 *
27 * $FreeBSD: head/sys/dev/mc146818/mc146818reg.h 137821 2004-11-17 16:37:25Z marius $
28 */
29
30/*
31 * Definitions for the Motorola MC146818A Real Time Clock.
32 * They also apply for the (compatible) Dallas Semiconductor DS1287A RTC.
33 *
34 * Though there are undoubtedly other (better) sources, this material was
35 * culled from the DEC "KN121 System Module Programmer's Reference
36 * Information."
37 *
38 * The MC146818A has 16 registers. The first 10 contain time-of-year
39 * and alarm data. The rest contain various control and status bits.
40 *
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138/*
139 * Time base (divisor select) constants (Control register A)
140 */
141#define MC_BASE_4_MHz 0x00 /* 4MHz crystal */
142#define MC_BASE_1_MHz 0x10 /* 1MHz crystal */
143#define MC_BASE_32_KHz 0x20 /* 32KHz crystal */
144#define MC_BASE_NONE 0x60 /* actually, both of these reset */
145#define MC_BASE_RESET 0x70
2 * Copyright (c) 1995 Carnegie-Mellon University.
3 * All rights reserved.
4 *
5 * Permission to use, copy, modify and distribute this software and
6 * its documentation is hereby granted, provided that both the copyright
7 * notice and this permission notice appear in all copies of the
8 * software, derivative works or modified versions, and any portions
--- 7 unchanged lines hidden (view full) ---
16 *
17 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
18 * School of Computer Science
19 * Carnegie Mellon University
20 * Pittsburgh PA 15213-3890
21 *
22 * any improvements or extensions that they make and grant Carnegie the
23 * rights to redistribute these changes.
24 *
25 * from: NetBSD: mc146818reg.h,v 1.5 2003/11/02 11:07:45 wiz Exp
26 *
27 * $FreeBSD: head/sys/dev/mc146818/mc146818reg.h 137821 2004-11-17 16:37:25Z marius $
28 */
29
30/*
31 * Definitions for the Motorola MC146818A Real Time Clock.
32 * They also apply for the (compatible) Dallas Semiconductor DS1287A RTC.
33 *
34 * Though there are undoubtedly other (better) sources, this material was
35 * culled from the DEC "KN121 System Module Programmer's Reference
36 * Information."
37 *
38 * The MC146818A has 16 registers. The first 10 contain time-of-year
39 * and alarm data. The rest contain various control and status bits.
40 *
--- 97 unchanged lines hidden (view full) ---
138/*
139 * Time base (divisor select) constants (Control register A)
140 */
141#define MC_BASE_4_MHz 0x00 /* 4MHz crystal */
142#define MC_BASE_1_MHz 0x10 /* 1MHz crystal */
143#define MC_BASE_32_KHz 0x20 /* 32KHz crystal */
144#define MC_BASE_NONE 0x60 /* actually, both of these reset */
145#define MC_BASE_RESET 0x70