--- /dev/null
+package net.mograsim.logic.model.am2900.components.am2910;
+
+import java.util.Map;
+import static net.mograsim.logic.core.types.Bit.*;
+
+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 GUIAm2910SP extends SimpleRectangularHardcodedGUIComponent
+{
+ public GUIAm2910SP(ViewModelModifiable model, String name)
+ {
+ super(model, name, "Stack\npointer");
+ setSize(40, 30);
+ addPin(new Pin(this, "STKI0", 1, 0, 5), Usage.INPUT, Position.RIGHT);
+ addPin(new Pin(this, "STKI1", 1, 0, 15), Usage.INPUT, Position.RIGHT);
+ addPin(new Pin(this, "C", 1, 0, 25), Usage.INPUT, Position.RIGHT);
+ addPin(new Pin(this, "A", 3, 10, 30), Usage.OUTPUT, Position.TOP);
+ addPin(new Pin(this, "B", 3, 30, 30), Usage.OUTPUT, Position.TOP);
+ addPin(new Pin(this, "_FULL", 1, 40, 15), Usage.OUTPUT, Position.LEFT);
+ }
+
+ @Override
+ protected Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
+ {
+ BitAndInt SPC = (BitAndInt) lastState;
+ if (SPC == null)
+ {
+ SPC = new BitAndInt();
+ SPC.bit = U;
+ SPC.i = -2;
+ }
+ int SP = SPC.i;
+
+ Bit STKI0Val = readEnds.get("STKI0").getValue();
+ Bit STKI1Val = readEnds.get("STKI1").getValue();
+ Bit CVal = readEnds.get("C").getValue();
+ if (SPC.bit == ZERO && CVal == ONE)
+ if (STKI0Val == U && STKI1Val == U)
+ SP = -2;
+ else if (!STKI0Val.isBinary() || !STKI1Val.isBinary())
+ SP = -1;
+ else if (STKI0Val == ONE && STKI1Val == ZERO)
+ {
+ // PUSH
+ if (SP >= 0)
+ SP = SP == 5 ? 5 : SP + 1;
+ } else if (STKI0Val == ZERO && STKI1Val == ONE)
+ // CLEAR
+ SP = 0;
+ else if (STKI0Val == ONE && STKI1Val == ONE)
+ // POP
+ SP = SP <= 0 ? SP : SP - 1;
+ readWriteEnds.get("A").feedSignals(getAsBitVector(SP == 0 ? 7 : SP - 1));
+ readWriteEnds.get("B").feedSignals(getAsBitVector(SP == 5 ? 4 : SP));
+ readWriteEnds.get("_FULL").feedSignals(SP == -2 ? U : SP == -1 ? X : SP == 5 ? ZERO : ONE);
+
+ SPC.i = SP;
+ SPC.bit = CVal;
+ return SPC;
+ }
+
+ private static class BitAndInt
+ {
+ Bit bit;
+ int i;
+ }
+
+ /**
+ * -1 means X, -2 means U
+ */
+ private static BitVector getAsBitVector(int i)
+ {
+ if (i == -1)
+ return BitVector.of(X, 3);
+ if (i == -2)
+ return BitVector.of(U, 3);
+ // TODO maybe this is the wrong way around
+ return BitVector.of((i & 0b100) > 0 ? ONE : ZERO, (i & 0b10) > 0 ? ONE : ZERO, (i & 0b1) > 0 ? ONE : ZERO);
+ }
+}
\ No newline at end of file
import java.util.List;
import net.mograsim.logic.model.SimpleLogicUIStandalone;
-import net.mograsim.logic.model.am2900.components.GUIram5_12;
+import net.mograsim.logic.model.am2900.components.am2910.GUIAm2910SP;
import net.mograsim.logic.model.model.ViewModelModifiable;
import net.mograsim.logic.model.model.components.GUIComponent;
import net.mograsim.logic.model.model.components.atomic.GUIBitDisplay;
public static void createTestbench(ViewModelModifiable model)
{
// GUIComponent comp = IndirectGUIComponentCreator.createComponent(model, "GUIAm2901", "Am2901");
- GUIComponent comp = new GUIram5_12(model, "c");
+ GUIComponent comp = new GUIAm2910SP(model, "c");
// guess which pins are outputs and which are inputs
// TODO this code exists four times... but it seems too "hacky" to put it in a helper class