uk.co.javagear
Class Accumulator

java.lang.Object
  uk.co.javagear.Accumulator

public final class Accumulator
extends java.lang.Object

Zilog Z80 CPU accumulator register emulation.

Version:

18th January 2003

Author:

Copyright (C) 2002-2003 Chris White

See Also:

"JavaGear Final Project Report"

Field Summary

private static Flag	f Flag register.
private static int	reg First register of the accumulator's bank.
private static int	reg2 Second register of the accumulator's bank.

Constructor Summary

Accumulator(Flag fl)
Accumulator constructor.

Method Summary

void	adc(int value) ADC 8 BIT - Add with carry.
void	add(int value) ADD 8 BIT.
void	and(int value) AND Operation.
void	clear() Clear register.
void	cp(int value) CP Operation - Compare with Accumulator.
void	cpl() CPL Operation - Complement Accumulator.
void	dec() Decrement register.
void	ex() Exchange register banks.
int	get() Get value of accumulator.
void	inc() Increment register.
void	or(int value) OR Operation.
void	rla() RLA Operation - Rotate Left Accumulator.
void	rlca() RLCA Operation - Rotate Left With Carry Accumulator.
void	rra() RRA Operation - Rotate Right Accumulator.
void	rrca() RRCA Operation - Rotate Right With Carry Accumulator.
void	sbc(int value) SBC 8 BIT.
void	set(int value) Set register.
void	sub(int value) SUB 8 BIT.
void	xor(int value) XOR Operation (Bitwise Exclusive OR).

Methods inherited from class java.lang.Object

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

Field Detail

reg

private static int reg

First register of the accumulator's bank.

reg2

private static int reg2

Second register of the accumulator's bank.

f

private static Flag f

Flag register.

Constructor Detail

Accumulator

public Accumulator(Flag fl)

Accumulator constructor.

Parameters:

fl - pointer to flag register.

Method Detail

clear

public void clear()

Clear register.

get

public int get()

Get value of accumulator.

Returns:

value stored in register.

set

public void set(int value)

Set register.

Parameters:

value - value to set register (0 - 0xFF).

inc

public void inc()

Increment register.

dec

public void dec()

Decrement register.

ex

public void ex()

Exchange register banks.

add

public void add(int value)

ADD 8 BIT.

Parameters:

value - value to add.

adc

public void adc(int value)

ADC 8 BIT - Add with carry.

Parameters:

value - value to add.

sub

public void sub(int value)

SUB 8 BIT.

Parameters:

value - value to subtract.

sbc

public void sbc(int value)

SBC 8 BIT.

Parameters:

value - subtract with carry.

and

public void and(int value)

AND Operation.

Parameters:

value - value to &.

or

public void or(int value)

OR Operation.

Parameters:

value - Value to |

xor

public void xor(int value)

XOR Operation (Bitwise Exclusive OR).

Parameters:

value - Value to ^

cp

public void cp(int value)

CP Operation - Compare with Accumulator.

Parameters:

value - Value to compare

cpl

public void cpl()

CPL Operation - Complement Accumulator.

rra

public void rra()

RRA Operation - Rotate Right Accumulator.

rla

public void rla()

RLA Operation - Rotate Left Accumulator.

rlca

public void rlca()

RLCA Operation - Rotate Left With Carry Accumulator.

rrca

public void rrca()

RRCA Operation - Rotate Right With Carry Accumulator.