Environment for Z80 emulation.

This class implements all input/output functions for the Z80 emulator class, that is it provides functions to access the system RAM, ROM and I/O ports.

An object of this class corresponds to a system that has no RAM, ROM or ports: users of the Z80 emulator should provide the desired behaviour by writing a descendant of this class.

Source:

z80.h:38

Author:

Alessandro Scotti

Version:

1.0

Entity	Type	Scope	Short Description
~Z80Environment	destructor	public	Destructor.
Z80Environment	constructor	public	Constructor.
Z80Environment	constructor	public	automatically generated
onReturnFromInterrupt	method	public	Called immediately after a RETI is executed.
operator =	operator	public	automatically generated
readByte	method	public	Reads one byte from memory at the specified address.
readPort	method	public	Reads one byte from the specified port.
writeByte	method	public	Writes one byte to memory at the specified address.
writePort	method	public	Writes one byte from the specified port.

Destructor.

Source:

z80.h:46

Code:

public virtual ~ Z80Environment ( )

Constructor.

Source:

z80.h:42

Code:

public Z80Environment (

)

automatically generated

Source:

z80.h

Code:

public Z80Environment (

const Z80Environment & )

Called immediately after a RETI is executed.

Source:

z80.h:94

Code:

public virtual void onReturnFromInterrupt (

)

automatically generated

Source:

z80.h

Code:

public Z80Environment & operator = (

const Z80Environment & )

Reads one byte from memory at the specified address.

The address parameter may contain any value, including values greater than 0xFFFF (64k), so if necessary the implementation must check for illegal values and handle them according to the implemented system specifications.

Source:

z80.h:59

Code:

public virtual unsigned char readByte (

unsigned addr )

Reads one byte from the specified port.

Note: the port value is always between 00h and FFh included.

Source:

z80.h:80

Code:

public virtual unsigned char readPort (

unsigned port )

Writes one byte to memory at the specified address.

The address parameter may contain any value, including values greater than 0xFFFF (64k), so if necessary the implementation must check for illegal values and handle them according to the implemented system specifications.

Source:

z80.h:71

Code:

public virtual void writeByte (	unsigned addr ,
	unsigned char value )

Writes one byte from the specified port.

Note: the port value is always between 00h and FFh included.

Source:

z80.h:88

Code:

public virtual void writePort (	unsigned port ,
	unsigned char value )

Copyright (c) 1997-2003,2004 Alessandro Scotti. All rights reserved.