dioscuri.module.rtc
Class CMOS

java.lang.Object
  dioscuri.module.rtc.CMOS

public class CMOS
extends java.lang.Object

Implementation of the CMOS memory

Notes: - register information is taken from CMOS Reference by Padgett Peterson, 2001. See: http://moon.inf.uji.es/docs/interr/CMOS/CMOS.HTM

Field Summary

protected static int	AMI_EXTEND_MEM_HIGH
protected static int	AMI_EXTEND_MEM_LOW
protected static int	ATA_POLICY_0_1
protected static int	ATA_POLICY_2_3
protected static int	AWARD_HD1_USERDEF
protected static int	CHECKSUM_HIGH_BYTE
protected static int	CHECKSUM_LOW_BYTE
protected static int	ELTORITO_BOOT
protected static int	ELTORITO_BOOT2
protected static int	FLOPPYDRIVE_TYPE
protected static int	IBM_BASE_MEM_HIGH
protected static int	IBM_BASE_MEM_LOW
protected static int	IBM_EQUIPMENT
protected static int	IBM_EXTEND_HD1
protected static int	IBM_EXTEND_HD2
protected static int	IBM_EXTEND_MEM_HIGH
protected static int	IBM_EXTEND_MEM_LOW
protected static int	IBM_EXTEND_MEM2_HIGH
protected static int	IBM_EXTEND_MEM2_LOW
protected static int	IBM_HD_DATA
protected static int	IBM_PS2_HD1_DATA
protected static int	IBM_PS2_HD2_DATA
protected static int	IBM_PS2_RTC_CENTURY
protected static int	IBM_RTC_CENTURY
protected byte[]	ram
protected static int	RTC_DATEOFMONTH
protected static int	RTC_DAYOFWEEK
protected static int	RTC_HOUR_ALARM
protected static int	RTC_HOURS
protected static int	RTC_MINUTE_ALARM
protected static int	RTC_MINUTES
protected static int	RTC_MONTH
protected static int	RTC_SECOND_ALARM
protected static int	RTC_SECONDS
protected static int	RTC_YEAR
protected static int	SHUTDOWN_STATUS
protected static int	STATUS_REGISTER_A
protected static int	STATUS_REGISTER_B
protected static int	STATUS_REGISTER_C
protected static int	STATUS_REGISTER_D

Constructor Summary

CMOS()
Class constructor

Method Summary

protected int	bcdToDec(byte bcdValue) Performs a conversion of bcd value into decimal.
protected byte	decToBcd(int decimalValue) Performs a conversion of decimal value into Binary Code Decimal (BCD).
protected java.lang.String	getClockValue() Returns string of decimal representation of time and date
protected void	reset(boolean systemTime)
protected void	setClockValue(int seconds) Updates the clock values

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ram

protected byte[] ram

RTC_SECONDS

protected static final int RTC_SECONDS

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Constant Field Values

RTC_SECOND_ALARM

protected static final int RTC_SECOND_ALARM

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RTC_MINUTES

protected static final int RTC_MINUTES

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RTC_MINUTE_ALARM

protected static final int RTC_MINUTE_ALARM

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RTC_HOURS

protected static final int RTC_HOURS

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RTC_HOUR_ALARM

protected static final int RTC_HOUR_ALARM

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RTC_DAYOFWEEK

protected static final int RTC_DAYOFWEEK

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RTC_DATEOFMONTH

protected static final int RTC_DATEOFMONTH

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RTC_MONTH

protected static final int RTC_MONTH

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RTC_YEAR

protected static final int RTC_YEAR

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STATUS_REGISTER_A

protected static final int STATUS_REGISTER_A

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STATUS_REGISTER_B

protected static final int STATUS_REGISTER_B

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STATUS_REGISTER_C

protected static final int STATUS_REGISTER_C

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STATUS_REGISTER_D

protected static final int STATUS_REGISTER_D

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SHUTDOWN_STATUS

protected static final int SHUTDOWN_STATUS

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FLOPPYDRIVE_TYPE

protected static final int FLOPPYDRIVE_TYPE

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Constant Field Values

IBM_PS2_HD1_DATA

protected static final int IBM_PS2_HD1_DATA

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IBM_HD_DATA

protected static final int IBM_HD_DATA

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IBM_PS2_HD2_DATA

protected static final int IBM_PS2_HD2_DATA

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IBM_EQUIPMENT

protected static final int IBM_EQUIPMENT

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Constant Field Values

IBM_BASE_MEM_LOW

protected static final int IBM_BASE_MEM_LOW

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IBM_BASE_MEM_HIGH

protected static final int IBM_BASE_MEM_HIGH

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IBM_EXTEND_MEM_LOW

protected static final int IBM_EXTEND_MEM_LOW

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IBM_EXTEND_MEM_HIGH

protected static final int IBM_EXTEND_MEM_HIGH

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IBM_EXTEND_HD1

protected static final int IBM_EXTEND_HD1

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IBM_EXTEND_HD2

protected static final int IBM_EXTEND_HD2

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AWARD_HD1_USERDEF

protected static final int AWARD_HD1_USERDEF

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CHECKSUM_HIGH_BYTE

protected static final int CHECKSUM_HIGH_BYTE

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CHECKSUM_LOW_BYTE

protected static final int CHECKSUM_LOW_BYTE

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IBM_EXTEND_MEM2_LOW

protected static final int IBM_EXTEND_MEM2_LOW

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IBM_EXTEND_MEM2_HIGH

protected static final int IBM_EXTEND_MEM2_HIGH

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IBM_RTC_CENTURY

protected static final int IBM_RTC_CENTURY

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AMI_EXTEND_MEM_LOW

protected static final int AMI_EXTEND_MEM_LOW

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AMI_EXTEND_MEM_HIGH

protected static final int AMI_EXTEND_MEM_HIGH

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IBM_PS2_RTC_CENTURY

protected static final int IBM_PS2_RTC_CENTURY

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ELTORITO_BOOT

protected static final int ELTORITO_BOOT

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ATA_POLICY_0_1

protected static final int ATA_POLICY_0_1

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ATA_POLICY_2_3

protected static final int ATA_POLICY_2_3

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ELTORITO_BOOT2

protected static final int ELTORITO_BOOT2

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Constant Field Values

Constructor Detail

CMOS

public CMOS()

Class constructor

Method Detail

reset

protected void reset(boolean systemTime)

Parameters:

systemTime -

decToBcd

protected byte decToBcd(int decimalValue)

Performs a conversion of decimal value into Binary Code Decimal (BCD). Note: results only in a one-byte-value. Large unsigned integers (> 255) will be cut off. Example of conversion: int 22 will result in 0x22 (or 0010.0010).

Parameters:

decimalValue -

Returns:

byte containing the BCD value of decimal

bcdToDec

protected int bcdToDec(byte bcdValue)

Performs a conversion of bcd value into decimal. Example of conversion: 0x22 (or 0010.0010) will result in int 22.

Parameters:

bcdValue -

Returns:

int containing the decimal value of bcd

getClockValue

protected java.lang.String getClockValue()

Returns string of decimal representation of time and date

Returns:

String

setClockValue

protected void setClockValue(int seconds)

Updates the clock values

Parameters:

seconds - Number of seconds to update the clock