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PisoShiftElm.java
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PisoShiftElm.java
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import java.awt.*;
import java.util.StringTokenizer;
// contributed by Edward Calver
class PisoShiftElm extends ChipElm {
boolean hasReset() {return false;}
public PisoShiftElm(int xx, int yy) { super(xx, yy); }
public PisoShiftElm(int xa, int ya, int xb, int yb, int f,
StringTokenizer st) {
super(xa, ya, xb, yb, f, st);
}
short data=0;//Lack of unsigned types sucks
boolean clockstate=false;
boolean modestate=false;
String getChipName() { return "PISO shift register"; }
void setupPins() {
sizeX = 10;
sizeY = 3;
pins = new Pin[getPostCount()];
pins[0] = new Pin(1, SIDE_W, "L");
pins[1] = new Pin(2, SIDE_W, "");
pins[1].clock=true;
pins[2] = new Pin(1, SIDE_N, "I7");
pins[3] = new Pin(2, SIDE_N, "I6");
pins[4] = new Pin(3, SIDE_N, "I5");
pins[5] = new Pin(4, SIDE_N, "I4");
pins[6] = new Pin(5, SIDE_N, "I3");
pins[7] = new Pin(6, SIDE_N, "I2");
pins[8] = new Pin(7, SIDE_N, "I1");
pins[9] = new Pin(8, SIDE_N, "I0");
pins[10] = new Pin(1, SIDE_E, "Q");
pins[10].output=true;
}
int getPostCount() {
return 11;
}
int getVoltageSourceCount() {return 1;}
void execute() {
if(pins[0].value&&!modestate)
{
modestate=true;
data=0;
if(pins[2].value)data+=128;
if(pins[3].value)data+=64;
if(pins[4].value)data+=32;
if(pins[5].value)data+=16;
if(pins[6].value)data+=8;
if(pins[7].value)data+=4;
if(pins[8].value)data+=2;
if(pins[9].value)data+=1;
}
else if(pins[1].value&&!clockstate)
{
clockstate=true;
if((data&1)==0)pins[10].value=false;
else pins[10].value=true;
data=(byte)(data>>>1);
}
if(!pins[0].value)modestate=false;
if(!pins[1].value)clockstate=false;
}
int getDumpType() { return 186; }
}