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Java Source | 1996-08-14 | 3.9 KB | 98 lines |
- //****************************************************************************
- // ---- version information ----
- //
- // FourBitBinaryCounter.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 creating and maintaining a
- // 4-bit binary counter
- //
- // 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 FourBitBinaryCounter extends IntegratedCircuit {
- int Count = 0;
-
- //----------------------------------------------------------------------------
- // The constructor of a new 4-bit binary counter
- //----------------------------------------------------------------------------
- public FourBitBinaryCounter(Pin PinGrid[][], int x, int y) {
- super (x, y, 10, 7 , 3, 1, 4, 5, 1, 4); // x,y,w,h HitBox x,y,w,h,I,O
- IPin[0] = new InputPin("C", 1, 3, 2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, inv
-
- OPin[0] = new OutputPin("A", 9, 2, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, inv
- OPin[1] = new OutputPin("B", 9, 3, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, inv
- OPin[2] = new OutputPin("C", 9, 4, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, inv
- OPin[3] = new OutputPin("D", 9, 5, -2, 0, 0, 0, ComponentPin.PIN_NORMAL); // name, x, y, w, h, inv
-
- ComponentName = "4-bit binary counter";
- ClassName = "FourBitBinaryCounter";
- RegisterPins (PinGrid, x, y);
- }
-
- //----------------------------------------------------------------------------
- // The constructor of a new counter, which is a copy of CompToCopy
- //----------------------------------------------------------------------------
- public FourBitBinaryCounter (ElectronicComponent CompToCopy, int xo, int yo) {
- super (CompToCopy, xo, yo);
- }
-
- //----------------------------------------------------------------------------
- // Method for copying this component.
- //----------------------------------------------------------------------------
- public ElectronicComponent Copy(int xo, int yo) {
- FourBitBinaryCounter NewComponent = new FourBitBinaryCounter(this, xo, yo);
- return NewComponent;
- }
-
- //----------------------------------------------------------------------------
- // Here is the code that's simulating the component
- //----------------------------------------------------------------------------
- public void SimulateLogic() {
- if (IPin[0].getOldLevel() == 0 && IPin[0].getLevel() == 5) {
- Count++;
- if (Count < 0 || Count > 15) Count = 0;
- }
- if ((Count & 0x01) == 0x01) {
- OPin[0].setLevel (5);
- } else {
- OPin[0].setLevel (0);
- }
- if ((Count & 0x02) == 0x02) {
- OPin[1].setLevel (5);
- } else {
- OPin[1].setLevel (0);
- }
- if ((Count & 0x04) == 0x04) {
- OPin[2].setLevel (5);
- } else {
- OPin[2].setLevel (0);
- }
- if ((Count & 0x08) == 0x08) {
- OPin[3].setLevel (5);
- } else {
- OPin[3].setLevel (0);
- }
- IPin[0].OldLevel = IPin[0].getLevel();
- }
- }