From f0f61790597d5aad144ded0ee4465e4fef13047c Mon Sep 17 00:00:00 2001
From: Darkress <30271678+DarkressX@users.noreply.github.com>
Date: Wed, 31 May 2023 01:43:48 +0200
Subject: [PATCH] implemented Retlw instruction

---
 de/darkress/pic16f84sim/commands/Retlw.java   | 24 +++++++++++++++++++
 de/darkress/pic16f84sim/commands/Return.java  |  2 ++
 .../pic16f84sim/decoder/CommandDecoder.java   |  3 +--
 3 files changed, 27 insertions(+), 2 deletions(-)
 create mode 100644 de/darkress/pic16f84sim/commands/Retlw.java

diff --git a/de/darkress/pic16f84sim/commands/Retlw.java b/de/darkress/pic16f84sim/commands/Retlw.java
new file mode 100644
index 0000000..dba9c94
--- /dev/null
+++ b/de/darkress/pic16f84sim/commands/Retlw.java
@@ -0,0 +1,24 @@
+package de.darkress.pic16f84sim.commands;
+
+import de.darkress.pic16f84sim.microcontroller.Memory;
+import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
+import de.darkress.pic16f84sim.microcontroller.Stack;
+
+public class Retlw extends CommandUtils implements Command
+{
+    private final int literal;
+
+    public Retlw(int input)
+    {
+        literal = input & 0x00FF;
+    }
+
+    @Override
+    public void execute()
+    {
+        Memory.workingRegister = literal;
+        ProgramCounter.setPcFrom11BitLiteral(Stack.pop());
+        //TODO: This may need some rework since it does not really load all 13 Bit into the PC. Only 8 Bit are
+        // effectively set
+    }
+}
diff --git a/de/darkress/pic16f84sim/commands/Return.java b/de/darkress/pic16f84sim/commands/Return.java
index e24e3f9..8f7f630 100644
--- a/de/darkress/pic16f84sim/commands/Return.java
+++ b/de/darkress/pic16f84sim/commands/Return.java
@@ -9,5 +9,7 @@ public class Return extends CommandUtils implements Command
     public void execute()
     {
         ProgramCounter.setPcFrom11BitLiteral(Stack.pop());
+        //TODO: This may need some rework since it does not really load all 13 Bit into the PC. Only 8 Bit are
+        // effectively set
     }
 }
diff --git a/de/darkress/pic16f84sim/decoder/CommandDecoder.java b/de/darkress/pic16f84sim/decoder/CommandDecoder.java
index 4c1942b..83ab994 100644
--- a/de/darkress/pic16f84sim/decoder/CommandDecoder.java
+++ b/de/darkress/pic16f84sim/decoder/CommandDecoder.java
@@ -110,8 +110,7 @@ public class CommandDecoder
             case 0x3000:
                 return new Movlw(input);
             case 0x3400:
-                //retlw();
-                break;
+                return new Retlw(input);
         }
 
         if ((input | 0x0060) == 0x0060)