jfrace.device
Class CPMEmulator

java.lang.Object
  |
  +--jfrace.device.CPMEmulator

All Implemented Interfaces:

java.awt.event.ActionListener, Device, java.util.EventListener, Hardware, java.awt.event.ItemListener

public class CPMEmulator

extends java.lang.Object

implements Device, java.awt.event.ActionListener, java.awt.event.ItemListener

Device which emulates the BIOS for CP/M V2.2.

Author:

Franz-Josef Elmer

Field Summary

static int	CONIN
static int	CONOUT
static int	CONST
static byte	DISK_ERROR BIOS return value for a disk error.
static java.lang.String	DRIVE_A
static java.lang.String	DRIVE_B
static byte	ERROR BIOS return value for an error.
static int	HOME
static int	LIST
static int	LISTST
static byte	OK BIOS return value in the case of no error.
static int	PUNCH
static int	READ
static int	READER
static java.lang.String	RESET_BUTTON
static int	SECTRAN
static int	SELDSK
static int	SETDMA
static int	SETSEC
static int	SETTRK
static int	WBOOT BIOS functions
static int	WRITE

Constructor Summary

CPMEmulator(AddressSpace as, java.lang.String theDiskPath, int jbiosSystemAdrPointer, int biosOffset, byte[] bios, int port, Terminal terminal)
Create a new instance.

Method Summary

void	actionPerformed(java.awt.event.ActionEvent event)
void	coldBoot() Cold boot.
byte	getByte(int address) Process BIOS function and return register A.
int	getNumberOfBits() Returns 8.
int	getNumberOfUnits() Returns 1.
int	getValue(int address) Returns 0.
void	itemStateChanged(java.awt.event.ItemEvent event)
byte	processBIOSFunction(int function, int arg1, int arg2) Process a BIOS call.
void	reset() Reset.
void	setAddButton(java.awt.Button button) Set 'add' button.
void	setByte(int address, byte value) Set the BIOS function code.
void	setDisk(int driveIndex, CPMDisk disk) Set a disk.
void	setValue(int address, int value) Does nothing.
byte	warmBoot() Load CCP and BDOS from the first disk found.

Methods inherited from class java.lang.Object

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

Field Detail

OK

public static final byte OK

BIOS return value in the case of no error.

ERROR

public static final byte ERROR

BIOS return value for an error.

DISK_ERROR

public static final byte DISK_ERROR

BIOS return value for a disk error.

WBOOT

public static final int WBOOT

BIOS functions

CONST

public static final int CONST

CONIN

public static final int CONIN

CONOUT

public static final int CONOUT

LIST

public static final int LIST

PUNCH

public static final int PUNCH

READER

public static final int READER

HOME

public static final int HOME

SELDSK

public static final int SELDSK

SETTRK

public static final int SETTRK

SETSEC

public static final int SETSEC

SETDMA

public static final int SETDMA

READ

public static final int READ

WRITE

public static final int WRITE

LISTST

public static final int LISTST

SECTRAN

public static final int SECTRAN

DRIVE_A

public static final java.lang.String DRIVE_A

DRIVE_B

public static final java.lang.String DRIVE_B

RESET_BUTTON

public static final java.lang.String RESET_BUTTON

Constructor Detail

CPMEmulator

public CPMEmulator(AddressSpace as,
                   java.lang.String theDiskPath,
                   int jbiosSystemAdrPointer,
                   int biosOffset,
                   byte[] bios,
                   int port,
                   Terminal terminal)

Create a new instance.

Parameters:

as - AddressSpace.

theDiskPath - Directory of the CP/M disks.

jbiosSystemAdrPointer - Address in AddressSpace where JBIOS system address is stored.

biosOffset - First address of the (J)BIOS.

bios - JBIOS binary data.

port - Processor port of the CP/M emulator.

terminal - Terminal.

Method Detail

setDisk

public void setDisk(int driveIndex,
                    CPMDisk disk)

Set a disk.

setAddButton

public void setAddButton(java.awt.Button button)

Set 'add' button.

processBIOSFunction

public byte processBIOSFunction(int function,
                                int arg1,
                                int arg2)

Process a BIOS call.

Parameters:

function - Number of BIOS function.

arg1 - First argument (i.e., BC register).

arg2 - Second argument (i.e., DE register).

Returns:

byte result (for A) and biosResult (for HL).

coldBoot

public void coldBoot()

Cold boot. Stops emulation, restores BIOS, reload BDOS and CCP, and restarts emulation.

warmBoot

public byte warmBoot()

Load CCP and BDOS from the first disk found. In order to find the CCP the method looks whether there is the text COPYRIGHT starting at the 24th byte of an 128 sector.

Returns:

OK if loading was successful.

reset

public void reset()

Reset. Restores BIOS

Specified by:

reset in interface Hardware

getNumberOfBits

public int getNumberOfBits()

Returns 8.

Specified by:

getNumberOfBits in interface Hardware

getNumberOfUnits

public int getNumberOfUnits()

Returns 1.

Specified by:

getNumberOfUnits in interface Device

getValue

public int getValue(int address)

Returns 0.

Specified by:

getValue in interface Device

Following copied from interface: jfrace.Device

Parameters:

address - Memory address.

Returns:

the value.

setValue

public void setValue(int address,
                     int value)

Does nothing.

Specified by:

setValue in interface Device

Following copied from interface: jfrace.Device

Parameters:

address - Memory address.

value - the new value.

getByte

public byte getByte(int address)

Process BIOS function and return register A.

Specified by:

getByte in interface Device

Following copied from interface: jfrace.Device

Parameters:

address - Memory address.

Returns:

the value of the byte at address.

setByte

public void setByte(int address,
                    byte value)

Set the BIOS function code.

Specified by:

setByte in interface Device

Parameters:

address - Will be ignored.

value - BIOS function code.

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent event)

Specified by:

actionPerformed in interface java.awt.event.ActionListener

itemStateChanged

public void itemStateChanged(java.awt.event.ItemEvent event)

Specified by:

itemStateChanged in interface java.awt.event.ItemListener