hades.models.pic
Class PicCalcSUBWF

java.lang.Object
  hades.models.pic.PicCalc
      hades.models.pic.PicCalcSUBWF

class PicCalcSUBWF

extends PicCalc

SUBWF-Operation

Field Summary

static int	CARRY
static int	DIGITCARRY
protected boolean	skip
protected PicByteReg	statusReg
static int	ZERO

Constructor Summary

PicCalcSUBWF(PicByteReg statusReg)

Method Summary

int	calc(int op1, int op2)
boolean	getSkip()
protected void	testCarry(int value) note that the CARRY flag is realized as NOTBORROW flag in the Pic16C84 ALU, see Microship datasheet 30445C.
protected void	testDigitCarry(int value) note that the DIGITCARRY flag is realized as NOTBORROW flag in the Pic16C84 ALU, see Microship datasheet 30445C.
protected void	testZero(int value)

Methods inherited from class java.lang.Object

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

Field Detail

statusReg

protected PicByteReg statusReg

skip

protected boolean skip

CARRY

public static int CARRY

DIGITCARRY

public static int DIGITCARRY

ZERO

public static int ZERO

Constructor Detail

PicCalcSUBWF

public PicCalcSUBWF(PicByteReg statusReg)

Method Detail

calc

public int calc(int op1,
                int op2)

Overrides:

calc in class PicCalc

testCarry

protected void testCarry(int value)

note that the CARRY flag is realized as NOTBORROW flag in the Pic16C84 ALU, see Microship datasheet 30445C. Therefore, we override the testCarry() from PicCalc to implement this (inverted) behavior. (FNH)

Overrides:

testCarry in class PicCalc

testDigitCarry

protected void testDigitCarry(int value)

note that the DIGITCARRY flag is realized as NOTBORROW flag in the Pic16C84 ALU, see Microship datasheet 30445C. Therefore, we override the testDigitCarry() from PicCalc to implement this (inverted) behavior. (FNH)

Overrides:

testDigitCarry in class PicCalc

testZero

protected void testZero(int value)

getSkip

public boolean getSkip()