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//****************************************************************************

// ---- version information ----

//

// EightBitSerInShiftReg.java   v 1.00 b1

// Written by:                  I. van Rienen / E-mail ivr@bart.nl

// URL:                         http://www/bart.nl/~ivr

// Initial release:

// Released in public domain:

//

// ---- Description ----

// Java class containing methods for an Eight bit serial in,

// parallel out shift register

//

// This program and the Java source is in the public domain.

// Permission to use, copy, modify, and distribute this software

// and its documentation for NON-COMMERCIAL purposes and

// without fee is hereby granted.

//

//    Copyright 1996

//

//    Iwan van Rienen

//    Joan Maetsuyckerstr. 145

//    2593 ZG  The Hague

//    The Netherlands

//

// I am not responsible for any bugs in this program and

// possible damage to hard- or software when using this program.

//****************************************************************************

import java.applet.Applet;

import java.awt.*;

import java.util.Vector;



class EightBitSerInShiftReg extends IntegratedCircuit {



//----------------------------------------------------------------------------

// The constructor of a new Eight bit serial in parallel out shift register

//----------------------------------------------------------------------------

    public EightBitSerInShiftReg(Pin PinGrid[][], int x, int y) {

        super (x, y, 10, 15, 3, 1, 4, 13, 3, 8);      // x,y,w,h HitBox x,y,w,h,I,O

        IPin[0] = new InputPin("C1", 1, 2, 2, 0, 0, 0, ComponentPin.PIN_EDGETRIGGERED); // name, x, y, w, h, flags

        IPin[1] = new InputPin("R", 1, 4, 2, 0, 0, 0, ComponentPin.PIN_NEGATIVE); // name, x, y, w, h, flags

        IPin[2] = new InputPin("D", 1, 6, 2, 0, 0, 0, ComponentPin.PIN_NOACTION); // name, x, y, w, h, flags



        OPin[0] = new OutputPin("1", 9, 6, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags

        OPin[1] = new OutputPin("2", 9, 7, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags

        OPin[2] = new OutputPin("3", 9, 8, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags

        OPin[3] = new OutputPin("4", 9, 9, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags

        OPin[4] = new OutputPin("5", 9, 10, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags

        OPin[5] = new OutputPin("6", 9, 11, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags

        OPin[6] = new OutputPin("7", 9, 12, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags

        OPin[7] = new OutputPin("8", 9, 13, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, flags

        ComponentName = "8-bit serial in shift register";

        ClassName = "EightBitSerInShiftReg";

        RegisterPins (PinGrid, x, y);

    }



//----------------------------------------------------------------------------

// The constructor of a new shift register, which is a copy of CompToCopy

//----------------------------------------------------------------------------

    public EightBitSerInShiftReg (ElectronicComponent CompToCopy, int xo, int yo) {

        super (CompToCopy, xo, yo);

    }



//----------------------------------------------------------------------------

// Method for copying this component.

//----------------------------------------------------------------------------

    public ElectronicComponent Copy(int xo, int yo) {

        EightBitSerInShiftReg NewComponent = new EightBitSerInShiftReg(this, xo, yo);

        return NewComponent;

    }



//----------------------------------------------------------------------------

// Here is the code that's simulating the component

//----------------------------------------------------------------------------

    public void SimulateLogic() {

        int ix;



        if (IPin[0].OldLevel == 0 && IPin[0].getLevel() == 5) {

             // Clock transition Low to High

             for (ix = 7; ix > 0; ix--) {

                OPin[ix].setLevel(OPin[ix - 1].getLevel());

            }

            OPin[0].setLevel (IPin[2].getLevel());

       } else {

            // Nothing happened. Outputs remain unchanged.

            // do setLevel() for modifying OldLevel.

             for (ix = 0; ix < 8; ix++) {

                OPin[ix].setLevel(OPin[ix].getLevel());

            }

        }



        if (IPin[1].getLevel() == 5) {

             // Reset

             for (ix = 0; ix < 8; ix++) {

                OPin[ix].setLevel(0);

            }

        }

        IPin[0].OldLevel = IPin[0].getLevel();

    }



//----------------------------------------------------------------------------

// Inform all components connected to the outputs with the OLD level,

// because this is an edge-triggered component.

//----------------------------------------------------------------------------

    public void Simulate(int id) {

        InformConnectedComponentsOldLevel(id);

    }

}