hades.models.pic
Class PicExec

java.lang.Object
  hades.models.pic.PicExec

Direct Known Subclasses:

PicExec16F84

public class PicExec

extends java.lang.Object

PicExec - the execution unit used in the PIC16C84. This class concludes all the parts needed to simulate this chip except the io.

Field Summary

int	action
PicAlu	alu
static int	ALUACTION The four different instruction types
static int	BITACTION
PicBreakPoint	breakPoint
PicClocking	clocking
PicDecode	decode
PicEeprom	eeprom
PicEprom	eprom The rt-elements
PicEpromBreakPoints	epromBreakPoints
static int	JUMPACTION
static int	LITERALACTION
PicWordReg	nextInstruction Instruction pipeline
PicWordReg	nextJump
int	operand
PicRegBank	regBank
PicRegBankBreakPoints	regBankBreakPoints
int	result
PicBitReg	skip
PicBitReg	sleep Sleep Mode
PicStack	stack
PicWdt	wdt
PicByteReg	workReg

Constructor Summary

PicExec()

Method Summary

void	advance() Increment clocking depending on sleep-mode
void	buildRegBank(PicBreakPoint breakPoint, PicEpromBreakPoints epromBreakPoints)
void	clock() this method has to be called to execute the different quarter cycles
void	fetchNextInstruction(int nextInstr) Get the next instruction or trash the pipeline
void	firstCycle() First quarter cycle, increment program-counter and decode instruction
void	fourthCycle() Fourth quarter cycle, write alu-result and fetch next instruction
void	incPc() increment program-counter or jump
void	por() Power-on-reset, just call the por()-method of all included parts
void	reset() Reset, just call the reset()-method of all included parts
void	secondCycle() Second quarter cycle, read the operands for third cycle
void	thirdCycle() Third quarter cycle, use ALU and increment timer0

Methods inherited from class java.lang.Object

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

Field Detail

ALUACTION

public static final int ALUACTION

The four different instruction types

See Also:

Constant Field Values

BITACTION

public static final int BITACTION

See Also:

Constant Field Values

JUMPACTION

public static final int JUMPACTION

See Also:

Constant Field Values

LITERALACTION

public static final int LITERALACTION

See Also:

Constant Field Values

eprom

public PicEprom eprom

The rt-elements

alu

public PicAlu alu

decode

public PicDecode decode

regBank

public PicRegBank regBank

workReg

public PicByteReg workReg

clocking

public PicClocking clocking

stack

public PicStack stack

eeprom

public PicEeprom eeprom

wdt

public PicWdt wdt

breakPoint

public PicBreakPoint breakPoint

regBankBreakPoints

public PicRegBankBreakPoints regBankBreakPoints

epromBreakPoints

public PicEpromBreakPoints epromBreakPoints

nextInstruction

public PicWordReg nextInstruction

Instruction pipeline

nextJump

public PicWordReg nextJump

skip

public PicBitReg skip

operand

public int operand

action

public int action

result

public int result

sleep

public PicBitReg sleep

Sleep Mode

Constructor Detail

PicExec

public PicExec()

Method Detail

buildRegBank

public void buildRegBank(PicBreakPoint breakPoint,
                         PicEpromBreakPoints epromBreakPoints)

por

public void por()

Power-on-reset, just call the por()-method of all included parts

reset

public void reset()

Reset, just call the reset()-method of all included parts

fetchNextInstruction

public void fetchNextInstruction(int nextInstr)

Get the next instruction or trash the pipeline

incPc

public void incPc()

increment program-counter or jump

firstCycle

public void firstCycle()

First quarter cycle, increment program-counter and decode instruction

secondCycle

public void secondCycle()

Second quarter cycle, read the operands for third cycle

thirdCycle

public void thirdCycle()

Third quarter cycle, use ALU and increment timer0

fourthCycle

public void fourthCycle()

Fourth quarter cycle, write alu-result and fetch next instruction

advance

public void advance()

Increment clocking depending on sleep-mode

clock

public void clock()

this method has to be called to execute the different quarter cycles