--- /dev/null
+package net.mograsim.logic.model.am2900.components.am2910;
+
+import static net.mograsim.logic.core.types.Bit.ONE;
+import static net.mograsim.logic.core.types.Bit.U;
+import static net.mograsim.logic.core.types.Bit.ZERO;
+
+import java.util.Arrays;
+import java.util.Map;
+
+import net.mograsim.logic.core.types.Bit;
+import net.mograsim.logic.core.types.BitVector;
+import net.mograsim.logic.core.wires.CoreWire.ReadEnd;
+import net.mograsim.logic.core.wires.CoreWire.ReadWriteEnd;
+import net.mograsim.logic.model.model.ViewModelModifiable;
+import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedModelComponent;
+import net.mograsim.logic.model.model.wires.Pin;
+import net.mograsim.logic.model.model.wires.PinUsage;
+import net.mograsim.logic.model.serializing.IndirectModelComponentCreator;
+import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
+
+public class ModelAm2910RegCntr extends SimpleRectangularHardcodedModelComponent
+{
+ public ModelAm2910RegCntr(ViewModelModifiable model, String name)
+ {
+ super(model, "Am2910RegCntr", name, "Register/\nCounter");
+ setSize(40, 40);
+ addPin(new Pin(this, "D", 12, PinUsage.INPUT, 20, 0), Position.BOTTOM);
+ addPin(new Pin(this, "_RLD", 1, PinUsage.INPUT, 0, 5), Position.RIGHT);
+ addPin(new Pin(this, "WE", 1, PinUsage.INPUT, 0, 20), Position.RIGHT);
+ addPin(new Pin(this, "DEC", 1, PinUsage.INPUT, 0, 30), Position.RIGHT);
+ addPin(new Pin(this, "C", 1, PinUsage.INPUT, 40, 20), Position.LEFT);
+ addPin(new Pin(this, "Y", 12, PinUsage.OUTPUT, 20, 40), Position.TOP);
+ }
+
+ @Override
+ public Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
+ {
+ Bit[] QC = (Bit[]) lastState;
+ if (QC == null)
+ {
+ QC = new Bit[13];
+ Arrays.fill(QC, U);
+ }
+
+ ReadEnd D = readEnds.get("D");
+ ReadEnd _RLD = readEnds.get("_RLD");
+ ReadEnd WE = readEnds.get("WE");
+ ReadEnd DEC = readEnds.get("DEC");
+ ReadEnd C = readEnds.get("C");
+ ReadWriteEnd Y = readWriteEnds.get("Y");
+
+ Bit oldCVal = QC[12];
+ Bit CVal = C.getValue();
+
+ // TODO handle U/X/Z
+ if (oldCVal == ZERO && CVal == ONE)
+ {
+ if ((DEC.getValue() == ZERO && WE.getValue() == ONE) || _RLD.getValue() == ZERO)
+ System.arraycopy(D.getValues().getBits(), 0, QC, 0, 12);
+ else if (WE.getValue() == ONE)
+ {
+ Bit carry = Bit.ZERO;
+ // TODO extract to helper. This code almost also exists in Modelinc12.
+ for (int i = 11; i >= 0; i--)
+ {
+ Bit a = QC[i];
+ QC[i] = a.xnor(carry);
+ carry = a.or(carry);
+ }
+ }
+ }
+ QC[12] = CVal;
+ Y.feedSignals(Arrays.copyOfRange(QC, 0, 12));
+
+ return QC;
+ }
+
+ @Override
+ protected Object getHighLevelState(Object state, String stateID)
+ {
+ switch (stateID)
+ {
+ case "q":
+ return BitVector.of(Arrays.copyOfRange((Bit[]) state, 0, 12));
+ default:
+ return super.getHighLevelState(state, stateID);
+ }
+ }
+
+ @Override
+ protected Object setHighLevelState(Object lastState, String stateID, Object newHighLevelState)
+ {
+ switch (stateID)
+ {
+ case "q":
+ BitVector newHighLevelStateCasted = (BitVector) newHighLevelState;
+ if (newHighLevelStateCasted.length() != 12)
+ throw new IllegalArgumentException("Expected BitVector of length 12, not " + newHighLevelStateCasted.length());
+ System.arraycopy(newHighLevelStateCasted.getBits(), 0, lastState, 0, 12);
+ return lastState;
+ default:
+ return super.setHighLevelState(lastState, stateID, newHighLevelState);
+ }
+ }
+
+ static
+ {
+ IndirectModelComponentCreator.setComponentSupplier(ModelAm2910RegCntr.class.getCanonicalName(),
+ (m, p, n) -> new ModelAm2910RegCntr(m, n));
+ }
+}
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