Implemented GUIram5_12

[Mograsim.git] / net.mograsim.logic.model.am2900 / src / net / mograsim / logic / model / am2900 / components / GUIram5_12.java

diff --git a/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUIram5_12.java b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUIram5_12.java
new file mode 100644 (file)
index 0000000..7dcea02
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+++ b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUIram5_12.java
@@ -0,0 +1,79 @@
+package net.mograsim.logic.model.am2900.components;
+
+import static net.mograsim.logic.core.types.Bit.*;
+
+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.Wire.ReadEnd;
+import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
+import net.mograsim.logic.model.model.ViewModelModifiable;
+import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedGUIComponent;
+import net.mograsim.logic.model.model.wires.Pin;
+import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
+
+public class GUIram5_12 extends SimpleRectangularHardcodedGUIComponent
+{
+       public GUIram5_12(ViewModelModifiable model, String name)
+       {
+               super(model, name, "RAM\n5 x 12 Bit");
+               setSize(40, 40);
+               addPin(new Pin(this, "A", 3, 10, 0), Usage.INPUT, Position.BOTTOM);
+               addPin(new Pin(this, "B", 3, 30, 0), Usage.INPUT, Position.BOTTOM);
+               addPin(new Pin(this, "WE", 1, 0, 5), Usage.INPUT, Position.RIGHT);
+               addPin(new Pin(this, "C", 1, 0, 15), Usage.INPUT, Position.RIGHT);
+               addPin(new Pin(this, "Y", 12, 0, 30), Usage.OUTPUT, Position.RIGHT);
+               addPin(new Pin(this, "D", 12, 20, 40), Usage.INPUT, Position.TOP);
+       }
+
+       @Override
+       protected Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
+       {
+               BitVector[] memC = (BitVector[]) lastState;
+               if (memC == null)
+               {
+                       memC = new BitVector[6];
+                       Arrays.fill(memC, 0, 5, BitVector.of(U, 12));
+                       memC[5] = BitVector.of(U);
+               }
+               BitVector CVal = readEnds.get("C").getValues();
+               BitVector oldC = memC[5];
+               // TODO is the timing right?
+               if (oldC.getLSBit(0) == ZERO && CVal.getLSBit(0) == ONE && readEnds.get("WE").getValue() == ONE)
+               {
+                       int BInt = getAsInt(readEnds.get("B").getValues());
+                       if (BInt == -1 || BInt > 4)
+                               Arrays.fill(memC, BitVector.of(X, 12));
+                       else if (BInt == -2)
+                               Arrays.fill(memC, BitVector.of(U, 12));
+                       else
+                               memC[BInt] = readEnds.get("D").getValues();
+               }
+               int AInt = getAsInt(readEnds.get("A").getValues());
+               BitVector YVal = AInt == -1 || AInt > 4 ? BitVector.of(X, 12) : AInt == -2 ? BitVector.of(U, 12) : memC[AInt];
+               readWriteEnds.get("Y").feedSignals(YVal);
+               memC[5] = CVal;
+               return memC;
+       }
+
+       /**
+        * -1 means X, -2 means U
+        */
+       private static int getAsInt(BitVector vect)
+       {
+               Bit[] bits = vect.getBits();
+               for (int i = 0; i < 3; i++)
+                       if (bits[i] == X)
+                               return -1;
+               for (int i = 0; i < 3; i++)
+                       if (bits[i] == U)
+                               return -2;
+               for (int i = 0; i < 3; i++)
+                       if (bits[i] == Z)
+                               return -1;
+               // TODO maybe this is the wrong way around
+               return (bits[0] == ONE ? 4 : 0) + (bits[1] == ONE ? 2 : 0) + (bits[2] == ONE ? 1 : 0);
+       }
+}
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