cmosconstants.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 89 行

/*
 * $Id: CMOSConstants.java,v 1.1 2003/11/25 11:41:59 epr Exp $
 */
package org.jnode.driver.cmos;

/**
 * @author epr
 */
public interface CMOSConstants {
	
	/** Port number for CMOS address register */
	public static final int PRW8_ADDRESS = 0x70;

	/** Port number for CMOS data register */
	public static final int PRW8_DATA = 0x71;
	
	public static final int CMOS_FIRST_PORT = PRW8_ADDRESS;
	public static final int CMOS_LAST_PORT = PRW8_DATA;
	
	// --------------------------------
	// CMOS registers
	
	public static final int CMOS_RTC_SECONDS			= 0x00;
	public static final int CMOS_RTC_SECONDS_ALARM	= 0x01;
	public static final int CMOS_RTC_MINUTES			= 0x02;
	public static final int CMOS_RTC_MINUTES_ALARM	= 0x03;
	public static final int CMOS_RTC_HOURS			= 0x04;
	public static final int CMOS_RTC_HOURS_ALARM		= 0x05;
	public static final int CMOS_RTC_DAY_OF_WEEK		= 0x06;
	public static final int CMOS_RTC_DAY_OF_MONTH	= 0x07;
	public static final int CMOS_RTC_MONTH			= 0x08;
	public static final int CMOS_RTC_YEAR			= 0x09;
	public static final int CMOS_FLOPPY_DRIVES		= 0x10;

	/* control registers - Moto names
	 */
	public static final int RTC_REG_A			= 10;
	public static final int RTC_REG_B			= 11;
	public static final int RTC_REG_C			= 12;
	public static final int RTC_REG_D			= 13;

	/**********************************************************************
	 * register details
	 **********************************************************************/
	public static final int RTC_FREQ_SELECT		= RTC_REG_A;

	/* update-in-progress  - set to "1" 244 microsecs before RTC goes off the bus,
	 * reset after update (may take 1.984ms @ 32768Hz RefClock) is complete,
	 * totalling to a max high interval of 2.228 ms.
	 */
	public static final int RTC_UIP				= 0x80;
	public static final int RTC_DIV_CTL			= 0x70;
	   /* divider control: refclock values 4.194 / 1.049 MHz / 32.768 kHz */
	public static final int RTC_REF_CLCK_4MHZ	= 0x00;
	public static final int RTC_REF_CLCK_1MHZ	= 0x10;
	public static final int RTC_REF_CLCK_32KHZ	= 0x20;
	   /* 2 values for divider stage reset, others for "testing purposes only" */
	public static final int RTC_DIV_RESET1		= 0x60;
	public static final int RTC_DIV_RESET2		= 0x70;
	  /* Periodic intr. / Square wave rate select. 0=none, 1=32.8kHz,... 15=2Hz */
	public static final int RTC_RATE_SELECT 		= 0x0F;

	/**********************************************************************/
	public static final int RTC_CONTROL			= RTC_REG_B;
	public static final int RTC_SET 				= 0x80;	/* disable updates for clock setting */
	public static final int RTC_PIE 				= 0x40;	/* periodic interrupt enable */
	public static final int RTC_AIE 				= 0x20;	/* alarm interrupt enable */
	public static final int RTC_UIE 				= 0x10;	/* update-finished interrupt enable */
	public static final int RTC_SQWE				= 0x08;	/* enable square-wave output */
	public static final int RTC_DM_BINARY		= 0x04;	/* all time/date values are BCD if clear */
	public static final int RTC_24H				= 0x02;	/* 24 hour mode - else hours bit 7 means pm */
	public static final int RTC_DST_EN			= 0x01;	/* auto switch DST - works f. USA only */

	/**********************************************************************/
	public static final int RTC_INTR_FLAGS		= RTC_REG_C;
	/* caution - cleared by read */
	public static final int RTC_IRQF 			= 0x80;	/* any of the following 3 is active */
	public static final int RTC_PF 				= 0x40;
	public static final int RTC_AF 				= 0x20;
	public static final int RTC_UF 				= 0x10;

	/**********************************************************************/
	public static final int RTC_VALID			= RTC_REG_D;
	public static final int RTC_VRT 				= 0x80;	/* valid RAM and time */
	/**********************************************************************/


}