Somewhat working Timer0Interrupt

de/darkress/pic16f84sim/commands/Retfie.java

@@ -0,0 +1,18 @@
+package de.darkress.pic16f84sim.commands;
+
+import de.darkress.pic16f84sim.microcontroller.Cycles;
+import de.darkress.pic16f84sim.microcontroller.Memory;
+import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
+import de.darkress.pic16f84sim.microcontroller.Stack;
+
+public class Retfie extends LiteralCommandUtils implements Command
+{
+    @Override
+    public void execute()
+    {
+        Cycles.incCycles();
+        Memory.setRegister(0x0B, Memory.getRegister(0x0B) | 0x80); //Set GIE
+        ProgramCounter.setPcFromStack(Stack.pop() + 1);
+        Cycles.incCycles(); // Simulate 2-Cycle Instruction
+    }
+}