From ca3cbd6b226036bc73f7d3cac36d93b6475c31b5 Mon Sep 17 00:00:00 2001
From: Alessandro Mauri <alemauri001@gmail.com>
Date: Sun, 20 Nov 2022 18:48:16 +0100
Subject: [PATCH] Sun Nov 20 06:48:16 PM CET 2022

---
 alu.dig          | 761 +++++++++++++++--------------------------------
 main.dig         |   6 +-
 multiply-add.dig | 134 +++++----
 signed_mul.dig   | 110 ++++---
 sreg.dig         |  72 ++++-
 5 files changed, 454 insertions(+), 629 deletions(-)

diff --git a/alu.dig b/alu.dig
index 0df437c..fd4922f 100644
--- a/alu.dig
+++ b/alu.dig
@@ -86,7 +86,7 @@
     <visualElement>
       <elementName>multiply-add.dig</elementName>
       <elementAttributes/>
-      <pos x="420" y="320"/>
+      <pos x="500" y="300"/>
     </visualElement>
     <visualElement>
       <elementName>In</elementName>
@@ -100,7 +100,7 @@
           <int>32</int>
         </entry>
       </elementAttributes>
-      <pos x="-120" y="380"/>
+      <pos x="-120" y="360"/>
     </visualElement>
     <visualElement>
       <elementName>Neg</elementName>
@@ -158,12 +158,7 @@
     </visualElement>
     <visualElement>
       <elementName>XOr</elementName>
-      <elementAttributes>
-        <entry>
-          <string>wideShape</string>
-          <boolean>true</boolean>
-        </entry>
-      </elementAttributes>
+      <elementAttributes/>
       <pos x="1040" y="1320"/>
     </visualElement>
     <visualElement>
@@ -236,7 +231,7 @@
           <int>32</int>
         </entry>
       </elementAttributes>
-      <pos x="1360" y="340"/>
+      <pos x="1360" y="320"/>
     </visualElement>
     <visualElement>
       <elementName>Out</elementName>
@@ -330,12 +325,7 @@
     </visualElement>
     <visualElement>
       <elementName>And</elementName>
-      <elementAttributes>
-        <entry>
-          <string>wideShape</string>
-          <boolean>true</boolean>
-        </entry>
-      </elementAttributes>
+      <elementAttributes/>
       <pos x="1160" y="1340"/>
     </visualElement>
     <visualElement>
@@ -345,21 +335,12 @@
           <string>rotation</string>
           <rotation rotation="3"/>
         </entry>
-        <entry>
-          <string>wideShape</string>
-          <boolean>true</boolean>
-        </entry>
       </elementAttributes>
       <pos x="280" y="1260"/>
     </visualElement>
     <visualElement>
       <elementName>And</elementName>
-      <elementAttributes>
-        <entry>
-          <string>wideShape</string>
-          <boolean>true</boolean>
-        </entry>
-      </elementAttributes>
+      <elementAttributes/>
       <pos x="1100" y="1040"/>
     </visualElement>
     <visualElement>
@@ -386,8 +367,8 @@
 
 0000 -&gt; ADD
 0001 -&gt; SUB
-0010 -&gt; MAD
-0011 -&gt; MADS
+0010 -&gt; MADUU
+0011 -&gt; MADSS
 0100 -&gt; AND
 0101 -&gt; OR
 0110 -&gt; XOR
@@ -399,7 +380,7 @@
 1100 -&gt; ROL
 1101 -&gt; ROR
 1110 -&gt; ASR
-1111 -&gt; NOP</string>
+1111 -&gt; MADSU</string>
         </entry>
       </elementAttributes>
       <pos x="-940" y="780"/>
@@ -432,23 +413,6 @@
       </elementAttributes>
       <pos x="-760" y="680"/>
     </visualElement>
-    <visualElement>
-      <elementName>And</elementName>
-      <elementAttributes>
-        <entry>
-          <string>inverterConfig</string>
-          <inverterConfig>
-            <string>In_1</string>
-            <string>In_2</string>
-          </inverterConfig>
-        </entry>
-        <entry>
-          <string>Inputs</string>
-          <int>4</int>
-        </entry>
-      </elementAttributes>
-      <pos x="-400" y="780"/>
-    </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
       <elementAttributes>
@@ -457,21 +421,7 @@
           <string>mad_s</string>
         </entry>
       </elementAttributes>
-      <pos x="-280" y="820"/>
-    </visualElement>
-    <visualElement>
-      <elementName>Splitter</elementName>
-      <elementAttributes>
-        <entry>
-          <string>Input Splitting</string>
-          <string>1*3</string>
-        </entry>
-        <entry>
-          <string>Output Splitting</string>
-          <string>3</string>
-        </entry>
-      </elementAttributes>
-      <pos x="-400" y="980"/>
+      <pos x="-260" y="840"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
@@ -481,7 +431,7 @@
           <string>shift_op</string>
         </entry>
       </elementAttributes>
-      <pos x="-280" y="980"/>
+      <pos x="-260" y="1120"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
@@ -509,24 +459,7 @@
           <string>mad_s</string>
         </entry>
       </elementAttributes>
-      <pos x="380" y="320"/>
-    </visualElement>
-    <visualElement>
-      <elementName>And</elementName>
-      <elementAttributes>
-        <entry>
-          <string>inverterConfig</string>
-          <inverterConfig>
-            <string>In_1</string>
-            <string>In_2</string>
-          </inverterConfig>
-        </entry>
-        <entry>
-          <string>Inputs</string>
-          <int>3</int>
-        </entry>
-      </elementAttributes>
-      <pos x="-400" y="900"/>
+      <pos x="380" y="260"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
@@ -536,7 +469,7 @@
           <string>long_z</string>
         </entry>
       </elementAttributes>
-      <pos x="-280" y="920"/>
+      <pos x="-260" y="980"/>
     </visualElement>
     <visualElement>
       <elementName>Multiplexer</elementName>
@@ -554,164 +487,126 @@
       <pos x="1320" y="1200"/>
     </visualElement>
     <visualElement>
-      <elementName>And</elementName>
-      <elementAttributes/>
-      <pos x="-460" y="1540"/>
+      <elementName>Tunnel</elementName>
+      <elementAttributes>
+        <entry>
+          <string>NetName</string>
+          <string>sel</string>
+        </entry>
+      </elementAttributes>
+      <pos x="-260" y="1260"/>
     </visualElement>
     <visualElement>
-      <elementName>And</elementName>
+      <elementName>XOr</elementName>
       <elementAttributes/>
-      <pos x="-460" y="1620"/>
+      <pos x="1260" y="1420"/>
     </visualElement>
     <visualElement>
-      <elementName>Or</elementName>
+      <elementName>Out</elementName>
       <elementAttributes>
         <entry>
-          <string>Inputs</string>
-          <int>3</int>
+          <string>Label</string>
+          <string>S</string>
         </entry>
       </elementAttributes>
-      <pos x="-360" y="1580"/>
+      <pos x="1360" y="1440"/>
     </visualElement>
     <visualElement>
-      <elementName>Splitter</elementName>
+      <elementName>LookUpTable</elementName>
       <elementAttributes>
         <entry>
-          <string>Input Splitting</string>
-          <string>1*3</string>
+          <string>Bits</string>
+          <int>3</int>
         </entry>
         <entry>
-          <string>Output Splitting</string>
-          <string>3</string>
+          <string>Inputs</string>
+          <int>4</int>
+        </entry>
+        <entry>
+          <string>Data</string>
+          <data>0,1,2,2,3,4,5,6,7*7,2</data>
         </entry>
       </elementAttributes>
-      <pos x="-220" y="1160"/>
+      <pos x="-340" y="1220"/>
     </visualElement>
     <visualElement>
-      <elementName>And</elementName>
-      <elementAttributes/>
-      <pos x="-460" y="1280"/>
-    </visualElement>
-    <visualElement>
-      <elementName>And</elementName>
+      <elementName>LookUpTable</elementName>
       <elementAttributes>
         <entry>
-          <string>inverterConfig</string>
-          <inverterConfig>
-            <string>In_2</string>
-            <string>In_3</string>
-          </inverterConfig>
-        </entry>
-        <entry>
-          <string>Inputs</string>
+          <string>Bits</string>
           <int>3</int>
         </entry>
-      </elementAttributes>
-      <pos x="-460" y="1360"/>
-    </visualElement>
-    <visualElement>
-      <elementName>And</elementName>
-      <elementAttributes>
         <entry>
-          <string>inverterConfig</string>
-          <inverterConfig>
-            <string>In_1</string>
-            <string>In_2</string>
-          </inverterConfig>
+          <string>Data</string>
+          <data>9*0,1,2,3,4,5,6</data>
         </entry>
         <entry>
           <string>Inputs</string>
-          <int>3</int>
+          <int>4</int>
         </entry>
       </elementAttributes>
-      <pos x="-460" y="1440"/>
+      <pos x="-340" y="1080"/>
     </visualElement>
     <visualElement>
-      <elementName>Or</elementName>
+      <elementName>LookUpTable</elementName>
       <elementAttributes>
         <entry>
           <string>Inputs</string>
           <int>4</int>
         </entry>
+        <entry>
+          <string>Data</string>
+          <data>0,0,1,1,11*0,1</data>
+        </entry>
       </elementAttributes>
-      <pos x="-360" y="1320"/>
+      <pos x="-340" y="940"/>
     </visualElement>
     <visualElement>
-      <elementName>And</elementName>
+      <elementName>Splitter</elementName>
       <elementAttributes>
         <entry>
-          <string>inverterConfig</string>
-          <inverterConfig>
-            <string>In_1</string>
-            <string>In_2</string>
-          </inverterConfig>
+          <string>Input Splitting</string>
+          <string>2</string>
         </entry>
         <entry>
-          <string>Inputs</string>
-          <int>3</int>
+          <string>Output Splitting</string>
+          <string>1,1</string>
         </entry>
       </elementAttributes>
-      <pos x="-460" y="1100"/>
+      <pos x="400" y="260"/>
     </visualElement>
     <visualElement>
-      <elementName>And</elementName>
+      <elementName>LookUpTable</elementName>
       <elementAttributes>
         <entry>
-          <string>inverterConfig</string>
-          <inverterConfig>
-            <string>In_1</string>
-            <string>In_3</string>
-          </inverterConfig>
+          <string>Bits</string>
+          <int>2</int>
         </entry>
         <entry>
-          <string>Inputs</string>
-          <int>3</int>
+          <string>Data</string>
+          <data>0,0,0,3,11*0,2</data>
         </entry>
-      </elementAttributes>
-      <pos x="-460" y="1180"/>
-    </visualElement>
-    <visualElement>
-      <elementName>Or</elementName>
-      <elementAttributes>
         <entry>
           <string>Inputs</string>
-          <int>3</int>
-        </entry>
-      </elementAttributes>
-      <pos x="-360" y="1140"/>
-    </visualElement>
-    <visualElement>
-      <elementName>Tunnel</elementName>
-      <elementAttributes>
-        <entry>
-          <string>NetName</string>
-          <string>sel</string>
+          <int>4</int>
         </entry>
       </elementAttributes>
-      <pos x="-160" y="1160"/>
+      <pos x="-340" y="800"/>
     </visualElement>
   </visualElements>
   <wires>
     <wire>
-      <p1 x="-540" y="1280"/>
-      <p2 x="-460" y="1280"/>
+      <p1 x="-440" y="1280"/>
+      <p2 x="-340" y="1280"/>
     </wire>
     <wire>
       <p1 x="280" y="900"/>
       <p2 x="420" y="900"/>
     </wire>
-    <wire>
-      <p1 x="-500" y="900"/>
-      <p2 x="-420" y="900"/>
-    </wire>
     <wire>
       <p1 x="900" y="1540"/>
       <p2 x="920" y="1540"/>
     </wire>
-    <wire>
-      <p1 x="-520" y="1540"/>
-      <p2 x="-460" y="1540"/>
-    </wire>
     <wire>
       <p1 x="540" y="1540"/>
       <p2 x="860" y="1540"/>
@@ -721,20 +616,20 @@
       <p2 x="1360" y="1540"/>
     </wire>
     <wire>
-      <p1 x="1220" y="1160"/>
-      <p2 x="1280" y="1160"/>
+      <p1 x="380" y="260"/>
+      <p2 x="400" y="260"/>
     </wire>
     <wire>
-      <p1 x="-500" y="1160"/>
-      <p2 x="-360" y="1160"/>
+      <p1 x="420" y="260"/>
+      <p2 x="460" y="260"/>
     </wire>
     <wire>
-      <p1 x="-300" y="1160"/>
-      <p2 x="-220" y="1160"/>
+      <p1 x="1220" y="1160"/>
+      <p2 x="1280" y="1160"/>
     </wire>
     <wire>
-      <p1 x="-200" y="1160"/>
-      <p2 x="-160" y="1160"/>
+      <p1 x="-460" y="1160"/>
+      <p2 x="-340" y="1160"/>
     </wire>
     <wire>
       <p1 x="820" y="1800"/>
@@ -749,12 +644,8 @@
       <p2 x="280" y="140"/>
     </wire>
     <wire>
-      <p1 x="-500" y="780"/>
-      <p2 x="-420" y="780"/>
-    </wire>
-    <wire>
-      <p1 x="260" y="400"/>
-      <p2 x="420" y="400"/>
+      <p1 x="1240" y="1420"/>
+      <p2 x="1260" y="1420"/>
     </wire>
     <wire>
       <p1 x="1060" y="1040"/>
@@ -765,44 +656,28 @@
       <p2 x="860" y="1680"/>
     </wire>
     <wire>
-      <p1 x="480" y="660"/>
-      <p2 x="600" y="660"/>
+      <p1 x="440" y="400"/>
+      <p2 x="500" y="400"/>
     </wire>
     <wire>
-      <p1 x="300" y="660"/>
-      <p2 x="420" y="660"/>
+      <p1 x="-460" y="1300"/>
+      <p2 x="-340" y="1300"/>
     </wire>
     <wire>
-      <p1 x="-400" y="1300"/>
-      <p2 x="-380" y="1300"/>
+      <p1 x="480" y="660"/>
+      <p2 x="600" y="660"/>
     </wire>
     <wire>
-      <p1 x="-400" y="1560"/>
-      <p2 x="-380" y="1560"/>
+      <p1 x="300" y="660"/>
+      <p2 x="420" y="660"/>
     </wire>
     <wire>
       <p1 x="520" y="1560"/>
       <p2 x="860" y="1560"/>
     </wire>
     <wire>
-      <p1 x="-520" y="920"/>
-      <p2 x="-420" y="920"/>
-    </wire>
-    <wire>
-      <p1 x="-340" y="920"/>
-      <p2 x="-280" y="920"/>
-    </wire>
-    <wire>
-      <p1 x="-380" y="1180"/>
-      <p2 x="-360" y="1180"/>
-    </wire>
-    <wire>
-      <p1 x="-500" y="1180"/>
-      <p2 x="-480" y="1180"/>
-    </wire>
-    <wire>
-      <p1 x="-280" y="1180"/>
-      <p2 x="-220" y="1180"/>
+      <p1 x="420" y="280"/>
+      <p2 x="440" y="280"/>
     </wire>
     <wire>
       <p1 x="720" y="1820"/>
@@ -817,15 +692,15 @@
       <p2 x="580" y="800"/>
     </wire>
     <wire>
-      <p1 x="-520" y="800"/>
-      <p2 x="-420" y="800"/>
+      <p1 x="-400" y="800"/>
+      <p2 x="-340" y="800"/>
     </wire>
     <wire>
-      <p1 x="-500" y="1440"/>
-      <p2 x="-480" y="1440"/>
+      <p1 x="1320" y="1440"/>
+      <p2 x="1360" y="1440"/>
     </wire>
     <wire>
-      <p1 x="1180" y="1060"/>
+      <p1 x="1160" y="1060"/>
       <p2 x="1220" y="1060"/>
     </wire>
     <wire>
@@ -854,52 +729,32 @@
     </wire>
     <wire>
       <p1 x="-740" y="680"/>
-      <p2 x="-560" y="680"/>
+      <p2 x="-400" y="680"/>
     </wire>
     <wire>
       <p1 x="1020" y="1320"/>
       <p2 x="1040" y="1320"/>
     </wire>
     <wire>
-      <p1 x="-380" y="1320"/>
-      <p2 x="-360" y="1320"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="1320"/>
-      <p2 x="-460" y="1320"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="1580"/>
-      <p2 x="-460" y="1580"/>
-    </wire>
-    <wire>
-      <p1 x="-380" y="1580"/>
-      <p2 x="-360" y="1580"/>
+      <p1 x="-400" y="940"/>
+      <p2 x="-340" y="940"/>
     </wire>
     <wire>
       <p1 x="580" y="1580"/>
       <p2 x="860" y="1580"/>
     </wire>
     <wire>
-      <p1 x="-540" y="940"/>
-      <p2 x="-400" y="940"/>
-    </wire>
-    <wire>
-      <p1 x="-400" y="1200"/>
-      <p2 x="-380" y="1200"/>
+      <p1 x="560" y="300"/>
+      <p2 x="660" y="300"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1200"/>
-      <p2 x="-460" y="1200"/>
+      <p1 x="460" y="300"/>
+      <p2 x="500" y="300"/>
     </wire>
     <wire>
       <p1 x="1300" y="1200"/>
       <p2 x="1320" y="1200"/>
     </wire>
-    <wire>
-      <p1 x="-260" y="1200"/>
-      <p2 x="-220" y="1200"/>
-    </wire>
     <wire>
       <p1 x="300" y="560"/>
       <p2 x="420" y="560"/>
@@ -913,20 +768,20 @@
       <p2 x="260" y="180"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1460"/>
-      <p2 x="-480" y="1460"/>
+      <p1 x="640" y="1460"/>
+      <p2 x="860" y="1460"/>
     </wire>
     <wire>
-      <p1 x="-400" y="1460"/>
-      <p2 x="-380" y="1460"/>
+      <p1 x="1020" y="1460"/>
+      <p2 x="1260" y="1460"/>
     </wire>
     <wire>
-      <p1 x="640" y="1460"/>
-      <p2 x="860" y="1460"/>
+      <p1 x="-420" y="820"/>
+      <p2 x="-340" y="820"/>
     </wire>
     <wire>
-      <p1 x="-340" y="820"/>
-      <p2 x="-280" y="820"/>
+      <p1 x="-400" y="1080"/>
+      <p2 x="-340" y="1080"/>
     </wire>
     <wire>
       <p1 x="1060" y="1080"/>
@@ -941,48 +796,44 @@
       <p2 x="860" y="1720"/>
     </wire>
     <wire>
-      <p1 x="1120" y="1340"/>
+      <p1 x="1100" y="1340"/>
       <p2 x="1160" y="1340"/>
     </wire>
-    <wire>
-      <p1 x="-500" y="1340"/>
-      <p2 x="-360" y="1340"/>
-    </wire>
     <wire>
       <p1 x="260" y="700"/>
       <p2 x="420" y="700"/>
     </wire>
     <wire>
       <p1 x="-740" y="700"/>
-      <p2 x="-540" y="700"/>
+      <p2 x="-420" y="700"/>
     </wire>
     <wire>
-      <p1 x="-300" y="1600"/>
-      <p2 x="-260" y="1600"/>
+      <p1 x="-420" y="960"/>
+      <p2 x="-340" y="960"/>
     </wire>
     <wire>
-      <p1 x="-500" y="1600"/>
-      <p2 x="-360" y="1600"/>
+      <p1 x="300" y="960"/>
+      <p2 x="420" y="960"/>
     </wire>
     <wire>
       <p1 x="600" y="1600"/>
       <p2 x="860" y="1600"/>
     </wire>
     <wire>
-      <p1 x="300" y="960"/>
-      <p2 x="420" y="960"/>
+      <p1 x="300" y="320"/>
+      <p2 x="500" y="320"/>
     </wire>
     <wire>
-      <p1 x="480" y="320"/>
-      <p2 x="660" y="320"/>
+      <p1 x="560" y="320"/>
+      <p2 x="800" y="320"/>
     </wire>
     <wire>
-      <p1 x="380" y="320"/>
-      <p2 x="420" y="320"/>
+      <p1 x="800" y="320"/>
+      <p2 x="1360" y="320"/>
     </wire>
     <wire>
-      <p1 x="-560" y="1220"/>
-      <p2 x="-480" y="1220"/>
+      <p1 x="-400" y="1220"/>
+      <p2 x="-340" y="1220"/>
     </wire>
     <wire>
       <p1 x="920" y="1220"/>
@@ -997,20 +848,16 @@
       <p2 x="740" y="580"/>
     </wire>
     <wire>
-      <p1 x="-540" y="840"/>
-      <p2 x="-400" y="840"/>
-    </wire>
-    <wire>
-      <p1 x="-540" y="1480"/>
-      <p2 x="-460" y="1480"/>
+      <p1 x="-280" y="840"/>
+      <p2 x="-260" y="840"/>
     </wire>
     <wire>
       <p1 x="620" y="1480"/>
       <p2 x="860" y="1480"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1100"/>
-      <p2 x="-480" y="1100"/>
+      <p1 x="-420" y="1100"/>
+      <p2 x="-340" y="1100"/>
     </wire>
     <wire>
       <p1 x="260" y="1100"/>
@@ -1032,61 +879,45 @@
       <p1 x="840" y="1740"/>
       <p2 x="860" y="1740"/>
     </wire>
-    <wire>
-      <p1 x="-740" y="720"/>
-      <p2 x="-520" y="720"/>
-    </wire>
     <wire>
       <p1 x="380" y="720"/>
       <p2 x="420" y="720"/>
     </wire>
     <wire>
-      <p1 x="1240" y="1360"/>
-      <p2 x="1360" y="1360"/>
-    </wire>
-    <wire>
-      <p1 x="320" y="1360"/>
-      <p2 x="1040" y="1360"/>
-    </wire>
-    <wire>
-      <p1 x="-520" y="1360"/>
-      <p2 x="-460" y="1360"/>
-    </wire>
-    <wire>
-      <p1 x="-300" y="1360"/>
-      <p2 x="-280" y="1360"/>
+      <p1 x="-740" y="720"/>
+      <p2 x="-440" y="720"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1620"/>
-      <p2 x="-460" y="1620"/>
+      <p1 x="1220" y="1360"/>
+      <p2 x="1240" y="1360"/>
     </wire>
     <wire>
-      <p1 x="-380" y="1620"/>
-      <p2 x="-360" y="1620"/>
+      <p1 x="320" y="1360"/>
+      <p2 x="1040" y="1360"/>
     </wire>
     <wire>
-      <p1 x="-560" y="980"/>
-      <p2 x="-400" y="980"/>
+      <p1 x="1240" y="1360"/>
+      <p2 x="1360" y="1360"/>
     </wire>
     <wire>
-      <p1 x="-380" y="980"/>
-      <p2 x="-280" y="980"/>
+      <p1 x="-280" y="980"/>
+      <p2 x="-260" y="980"/>
     </wire>
     <wire>
       <p1 x="500" y="980"/>
       <p2 x="540" y="980"/>
     </wire>
     <wire>
-      <p1 x="300" y="340"/>
-      <p2 x="420" y="340"/>
+      <p1 x="280" y="340"/>
+      <p2 x="500" y="340"/>
     </wire>
     <wire>
-      <p1 x="480" y="340"/>
-      <p2 x="800" y="340"/>
+      <p1 x="560" y="340"/>
+      <p2 x="780" y="340"/>
     </wire>
     <wire>
-      <p1 x="800" y="340"/>
-      <p2 x="1360" y="340"/>
+      <p1 x="-420" y="1240"/>
+      <p2 x="-340" y="1240"/>
     </wire>
     <wire>
       <p1 x="980" y="1240"/>
@@ -1108,25 +939,21 @@
       <p1 x="880" y="1880"/>
       <p2 x="920" y="1880"/>
     </wire>
-    <wire>
-      <p1 x="-560" y="860"/>
-      <p2 x="-400" y="860"/>
-    </wire>
     <wire>
       <p1 x="300" y="860"/>
       <p2 x="420" y="860"/>
     </wire>
     <wire>
-      <p1 x="660" y="1500"/>
-      <p2 x="860" y="1500"/>
+      <p1 x="-440" y="860"/>
+      <p2 x="-340" y="860"/>
     </wire>
     <wire>
-      <p1 x="-400" y="1120"/>
-      <p2 x="-380" y="1120"/>
+      <p1 x="660" y="1500"/>
+      <p2 x="860" y="1500"/>
     </wire>
     <wire>
-      <p1 x="-540" y="1120"/>
-      <p2 x="-480" y="1120"/>
+      <p1 x="-280" y="1120"/>
+      <p2 x="-260" y="1120"/>
     </wire>
     <wire>
       <p1 x="920" y="1120"/>
@@ -1156,10 +983,6 @@
       <p1 x="840" y="1760"/>
       <p2 x="860" y="1760"/>
     </wire>
-    <wire>
-      <p1 x="-740" y="740"/>
-      <p2 x="-500" y="740"/>
-    </wire>
     <wire>
       <p1 x="-140" y="100"/>
       <p2 x="300" y="100"/>
@@ -1169,48 +992,40 @@
       <p2 x="1160" y="1380"/>
     </wire>
     <wire>
-      <p1 x="-540" y="1380"/>
-      <p2 x="-480" y="1380"/>
-    </wire>
-    <wire>
-      <p1 x="-400" y="1380"/>
-      <p2 x="-360" y="1380"/>
-    </wire>
-    <wire>
-      <p1 x="-400" y="1640"/>
-      <p2 x="-380" y="1640"/>
+      <p1 x="-740" y="740"/>
+      <p2 x="-460" y="740"/>
     </wire>
     <wire>
-      <p1 x="-540" y="1000"/>
-      <p2 x="-400" y="1000"/>
+      <p1 x="-440" y="1000"/>
+      <p2 x="-340" y="1000"/>
     </wire>
     <wire>
       <p1 x="280" y="1000"/>
       <p2 x="420" y="1000"/>
     </wire>
     <wire>
-      <p1 x="280" y="360"/>
-      <p2 x="420" y="360"/>
+      <p1 x="-120" y="360"/>
+      <p2 x="500" y="360"/>
     </wire>
     <wire>
-      <p1 x="480" y="360"/>
-      <p2 x="780" y="360"/>
+      <p1 x="-280" y="1260"/>
+      <p2 x="-260" y="1260"/>
     </wire>
     <wire>
       <p1 x="500" y="880"/>
       <p2 x="560" y="880"/>
     </wire>
     <wire>
-      <p1 x="560" y="1520"/>
-      <p2 x="860" y="1520"/>
+      <p1 x="-460" y="880"/>
+      <p2 x="-340" y="880"/>
     </wire>
     <wire>
-      <p1 x="-380" y="1140"/>
-      <p2 x="-360" y="1140"/>
+      <p1 x="560" y="1520"/>
+      <p2 x="860" y="1520"/>
     </wire>
     <wire>
-      <p1 x="-560" y="1140"/>
-      <p2 x="-460" y="1140"/>
+      <p1 x="-440" y="1140"/>
+      <p2 x="-340" y="1140"/>
     </wire>
     <wire>
       <p1 x="1320" y="1140"/>
@@ -1225,20 +1040,8 @@
       <p2 x="860" y="1780"/>
     </wire>
     <wire>
-      <p1 x="-560" y="1400"/>
-      <p2 x="-480" y="1400"/>
-    </wire>
-    <wire>
-      <p1 x="-380" y="1400"/>
-      <p2 x="-360" y="1400"/>
-    </wire>
-    <wire>
-      <p1 x="-540" y="1660"/>
-      <p2 x="-460" y="1660"/>
-    </wire>
-    <wire>
-      <p1 x="880" y="1660"/>
-      <p2 x="920" y="1660"/>
+      <p1 x="-460" y="1020"/>
+      <p2 x="-340" y="1020"/>
     </wire>
     <wire>
       <p1 x="800" y="1020"/>
@@ -1249,12 +1052,12 @@
       <p2 x="1060" y="1020"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1020"/>
-      <p2 x="-400" y="1020"/>
+      <p1 x="260" y="380"/>
+      <p2 x="500" y="380"/>
     </wire>
     <wire>
-      <p1 x="-120" y="380"/>
-      <p2 x="420" y="380"/>
+      <p1 x="880" y="1660"/>
+      <p2 x="920" y="1660"/>
     </wire>
     <wire>
       <p1 x="640" y="460"/>
@@ -1268,10 +1071,6 @@
       <p1 x="320" y="1240"/>
       <p2 x="320" y="1360"/>
     </wire>
-    <wire>
-      <p1 x="-260" y="1200"/>
-      <p2 x="-260" y="1600"/>
-    </wire>
     <wire>
       <p1 x="580" y="800"/>
       <p2 x="580" y="1580"/>
@@ -1285,15 +1084,15 @@
       <p2 x="260" y="1160"/>
     </wire>
     <wire>
-      <p1 x="260" y="1360"/>
+      <p1 x="260" y="1340"/>
       <p2 x="260" y="1380"/>
     </wire>
     <wire>
       <p1 x="260" y="180"/>
-      <p2 x="260" y="400"/>
+      <p2 x="260" y="380"/>
     </wire>
     <wire>
-      <p1 x="260" y="400"/>
+      <p1 x="260" y="380"/>
       <p2 x="260" y="500"/>
     </wire>
     <wire>
@@ -1309,72 +1108,76 @@
       <p2 x="1220" y="1160"/>
     </wire>
     <wire>
-      <p1 x="-520" y="720"/>
-      <p2 x="-520" y="800"/>
+      <p1 x="520" y="1080"/>
+      <p2 x="520" y="1560"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1200"/>
-      <p2 x="-520" y="1360"/>
+      <p1 x="520" y="1560"/>
+      <p2 x="520" y="1840"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1620"/>
-      <p2 x="-520" y="1760"/>
+      <p1 x="840" y="1740"/>
+      <p2 x="840" y="1760"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1100"/>
-      <p2 x="-520" y="1200"/>
+      <p1 x="840" y="1760"/>
+      <p2 x="840" y="1780"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1540"/>
-      <p2 x="-520" y="1620"/>
+      <p1 x="840" y="1780"/>
+      <p2 x="840" y="1800"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1020"/>
-      <p2 x="-520" y="1100"/>
+      <p1 x="-460" y="740"/>
+      <p2 x="-460" y="880"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1460"/>
-      <p2 x="-520" y="1540"/>
+      <p1 x="-460" y="880"/>
+      <p2 x="-460" y="1020"/>
     </wire>
     <wire>
-      <p1 x="-520" y="920"/>
-      <p2 x="-520" y="1020"/>
+      <p1 x="-460" y="1300"/>
+      <p2 x="-460" y="1360"/>
     </wire>
     <wire>
-      <p1 x="-520" y="1360"/>
-      <p2 x="-520" y="1460"/>
+      <p1 x="-460" y="1160"/>
+      <p2 x="-460" y="1300"/>
     </wire>
     <wire>
-      <p1 x="-520" y="800"/>
-      <p2 x="-520" y="920"/>
+      <p1 x="-460" y="1020"/>
+      <p2 x="-460" y="1160"/>
     </wire>
     <wire>
-      <p1 x="520" y="1080"/>
-      <p2 x="520" y="1560"/>
+      <p1 x="780" y="340"/>
+      <p2 x="780" y="1720"/>
     </wire>
     <wire>
-      <p1 x="520" y="1560"/>
-      <p2 x="520" y="1840"/>
+      <p1 x="780" y="1720"/>
+      <p2 x="780" y="1840"/>
     </wire>
     <wire>
-      <p1 x="840" y="1740"/>
-      <p2 x="840" y="1760"/>
+      <p1 x="460" y="260"/>
+      <p2 x="460" y="300"/>
     </wire>
     <wire>
-      <p1 x="840" y="1760"/>
-      <p2 x="840" y="1780"/>
+      <p1 x="-400" y="680"/>
+      <p2 x="-400" y="800"/>
     </wire>
     <wire>
-      <p1 x="840" y="1780"/>
-      <p2 x="840" y="1800"/>
+      <p1 x="-400" y="1080"/>
+      <p2 x="-400" y="1220"/>
     </wire>
     <wire>
-      <p1 x="780" y="360"/>
-      <p2 x="780" y="1720"/>
+      <p1 x="-400" y="940"/>
+      <p2 x="-400" y="1080"/>
     </wire>
     <wire>
-      <p1 x="780" y="1720"/>
-      <p2 x="780" y="1840"/>
+      <p1 x="-400" y="800"/>
+      <p2 x="-400" y="940"/>
+    </wire>
+    <wire>
+      <p1 x="-400" y="1220"/>
+      <p2 x="-400" y="1360"/>
     </wire>
     <wire>
       <p1 x="720" y="680"/>
@@ -1389,17 +1192,13 @@
       <p2 x="1300" y="1200"/>
     </wire>
     <wire>
-      <p1 x="660" y="320"/>
+      <p1 x="660" y="300"/>
       <p2 x="660" y="1500"/>
     </wire>
     <wire>
       <p1 x="660" y="1500"/>
       <p2 x="660" y="1840"/>
     </wire>
-    <wire>
-      <p1 x="-280" y="1180"/>
-      <p2 x="-280" y="1360"/>
-    </wire>
     <wire>
       <p1 x="600" y="660"/>
       <p2 x="600" y="1600"/>
@@ -1422,7 +1221,7 @@
     </wire>
     <wire>
       <p1 x="280" y="140"/>
-      <p2 x="280" y="360"/>
+      <p2 x="280" y="340"/>
     </wire>
     <wire>
       <p1 x="280" y="580"/>
@@ -1437,7 +1236,7 @@
       <p2 x="280" y="1260"/>
     </wire>
     <wire>
-      <p1 x="280" y="360"/>
+      <p1 x="280" y="340"/>
       <p2 x="280" y="480"/>
     </wire>
     <wire>
@@ -1453,52 +1252,40 @@
       <p2 x="280" y="1100"/>
     </wire>
     <wire>
-      <p1 x="-540" y="700"/>
-      <p2 x="-540" y="840"/>
-    </wire>
-    <wire>
-      <p1 x="-540" y="840"/>
-      <p2 x="-540" y="940"/>
-    </wire>
-    <wire>
-      <p1 x="-540" y="1280"/>
-      <p2 x="-540" y="1380"/>
+      <p1 x="1240" y="1360"/>
+      <p2 x="1240" y="1420"/>
     </wire>
     <wire>
-      <p1 x="-540" y="1660"/>
-      <p2 x="-540" y="1760"/>
+      <p1 x="540" y="980"/>
+      <p2 x="540" y="1540"/>
     </wire>
     <wire>
-      <p1 x="-540" y="1120"/>
-      <p2 x="-540" y="1280"/>
+      <p1 x="540" y="1540"/>
+      <p2 x="540" y="1840"/>
     </wire>
     <wire>
-      <p1 x="-540" y="1000"/>
-      <p2 x="-540" y="1120"/>
+      <p1 x="800" y="320"/>
+      <p2 x="800" y="1020"/>
     </wire>
     <wire>
-      <p1 x="-540" y="1480"/>
-      <p2 x="-540" y="1660"/>
+      <p1 x="-420" y="700"/>
+      <p2 x="-420" y="820"/>
     </wire>
     <wire>
-      <p1 x="-540" y="940"/>
-      <p2 x="-540" y="1000"/>
+      <p1 x="-420" y="1240"/>
+      <p2 x="-420" y="1360"/>
     </wire>
     <wire>
-      <p1 x="-540" y="1380"/>
-      <p2 x="-540" y="1480"/>
+      <p1 x="-420" y="1100"/>
+      <p2 x="-420" y="1240"/>
     </wire>
     <wire>
-      <p1 x="540" y="980"/>
-      <p2 x="540" y="1540"/>
+      <p1 x="-420" y="960"/>
+      <p2 x="-420" y="1100"/>
     </wire>
     <wire>
-      <p1 x="540" y="1540"/>
-      <p2 x="540" y="1840"/>
-    </wire>
-    <wire>
-      <p1 x="800" y="340"/>
-      <p2 x="800" y="1020"/>
+      <p1 x="-420" y="820"/>
+      <p2 x="-420" y="960"/>
     </wire>
     <wire>
       <p1 x="740" y="580"/>
@@ -1526,7 +1313,7 @@
     </wire>
     <wire>
       <p1 x="300" y="100"/>
-      <p2 x="300" y="340"/>
+      <p2 x="300" y="320"/>
     </wire>
     <wire>
       <p1 x="300" y="960"/>
@@ -1553,45 +1340,13 @@
       <p2 x="300" y="860"/>
     </wire>
     <wire>
-      <p1 x="300" y="340"/>
+      <p1 x="300" y="320"/>
       <p2 x="300" y="460"/>
     </wire>
     <wire>
       <p1 x="300" y="860"/>
       <p2 x="300" y="960"/>
     </wire>
-    <wire>
-      <p1 x="-560" y="680"/>
-      <p2 x="-560" y="860"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="1400"/>
-      <p2 x="-560" y="1580"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="860"/>
-      <p2 x="-560" y="980"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="1320"/>
-      <p2 x="-560" y="1400"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="1220"/>
-      <p2 x="-560" y="1320"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="1140"/>
-      <p2 x="-560" y="1220"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="1580"/>
-      <p2 x="-560" y="1760"/>
-    </wire>
-    <wire>
-      <p1 x="-560" y="980"/>
-      <p2 x="-560" y="1140"/>
-    </wire>
     <wire>
       <p1 x="240" y="1180"/>
       <p2 x="240" y="1260"/>
@@ -1613,36 +1368,24 @@
       <p2 x="880" y="1880"/>
     </wire>
     <wire>
-      <p1 x="-500" y="740"/>
-      <p2 x="-500" y="780"/>
+      <p1 x="-440" y="720"/>
+      <p2 x="-440" y="860"/>
     </wire>
     <wire>
-      <p1 x="-500" y="1160"/>
-      <p2 x="-500" y="1180"/>
+      <p1 x="-440" y="1280"/>
+      <p2 x="-440" y="1360"/>
     </wire>
     <wire>
-      <p1 x="-500" y="1600"/>
-      <p2 x="-500" y="1760"/>
+      <p1 x="-440" y="1140"/>
+      <p2 x="-440" y="1280"/>
     </wire>
     <wire>
-      <p1 x="-500" y="1440"/>
-      <p2 x="-500" y="1600"/>
+      <p1 x="-440" y="1000"/>
+      <p2 x="-440" y="1140"/>
     </wire>
     <wire>
-      <p1 x="-500" y="900"/>
-      <p2 x="-500" y="1160"/>
-    </wire>
-    <wire>
-      <p1 x="-500" y="1340"/>
-      <p2 x="-500" y="1440"/>
-    </wire>
-    <wire>
-      <p1 x="-500" y="780"/>
-      <p2 x="-500" y="900"/>
-    </wire>
-    <wire>
-      <p1 x="-500" y="1180"/>
-      <p2 x="-500" y="1340"/>
+      <p1 x="-440" y="860"/>
+      <p2 x="-440" y="1000"/>
     </wire>
     <wire>
       <p1 x="760" y="480"/>
@@ -1653,33 +1396,17 @@
       <p2 x="760" y="1840"/>
     </wire>
     <wire>
-      <p1 x="-380" y="1560"/>
-      <p2 x="-380" y="1580"/>
-    </wire>
-    <wire>
-      <p1 x="-380" y="1620"/>
-      <p2 x="-380" y="1640"/>
-    </wire>
-    <wire>
-      <p1 x="-380" y="1300"/>
-      <p2 x="-380" y="1320"/>
-    </wire>
-    <wire>
-      <p1 x="-380" y="1400"/>
-      <p2 x="-380" y="1460"/>
-    </wire>
-    <wire>
-      <p1 x="-380" y="1120"/>
-      <p2 x="-380" y="1140"/>
-    </wire>
-    <wire>
-      <p1 x="-380" y="1180"/>
-      <p2 x="-380" y="1200"/>
+      <p1 x="440" y="280"/>
+      <p2 x="440" y="400"/>
     </wire>
     <wire>
       <p1 x="1020" y="1240"/>
       <p2 x="1020" y="1320"/>
     </wire>
+    <wire>
+      <p1 x="1020" y="1320"/>
+      <p2 x="1020" y="1460"/>
+    </wire>
   </wires>
   <measurementOrdering/>
 </circuit>
\ No newline at end of file
diff --git a/main.dig b/main.dig
index d6c1323..b3d21fe 100644
--- a/main.dig
+++ b/main.dig
@@ -31,7 +31,7 @@
     <visualElement>
       <elementName>decode.dig</elementName>
       <elementAttributes/>
-      <pos x="100" y="300"/>
+      <pos x="240" y="580"/>
     </visualElement>
     <visualElement>
       <elementName>RAMSinglePort</elementName>
@@ -98,6 +98,10 @@
       <p1 x="80" y="580"/>
       <p2 x="100" y="580"/>
     </wire>
+    <wire>
+      <p1 x="160" y="580"/>
+      <p2 x="240" y="580"/>
+    </wire>
     <wire>
       <p1 x="20" y="660"/>
       <p2 x="40" y="660"/>
diff --git a/multiply-add.dig b/multiply-add.dig
index df728f6..f60b80f 100644
--- a/multiply-add.dig
+++ b/multiply-add.dig
@@ -8,10 +8,10 @@
       <elementAttributes>
         <entry>
           <string>Label</string>
-          <string>S</string>
+          <string>S_a</string>
         </entry>
       </elementAttributes>
-      <pos x="1120" y="280"/>
+      <pos x="1120" y="260"/>
     </visualElement>
     <visualElement>
       <elementName>In</elementName>
@@ -25,7 +25,7 @@
           <int>32</int>
         </entry>
       </elementAttributes>
-      <pos x="1120" y="320"/>
+      <pos x="1120" y="300"/>
     </visualElement>
     <visualElement>
       <elementName>In</elementName>
@@ -39,7 +39,7 @@
           <int>32</int>
         </entry>
       </elementAttributes>
-      <pos x="1120" y="360"/>
+      <pos x="1120" y="340"/>
     </visualElement>
     <visualElement>
       <elementName>Splitter</elementName>
@@ -53,7 +53,7 @@
           <string>32,32</string>
         </entry>
       </elementAttributes>
-      <pos x="1600" y="300"/>
+      <pos x="1600" y="320"/>
     </visualElement>
     <visualElement>
       <elementName>Out</elementName>
@@ -67,7 +67,7 @@
           <int>32</int>
         </entry>
       </elementAttributes>
-      <pos x="1680" y="280"/>
+      <pos x="1680" y="300"/>
     </visualElement>
     <visualElement>
       <elementName>Out</elementName>
@@ -81,7 +81,7 @@
           <int>32</int>
         </entry>
       </elementAttributes>
-      <pos x="1680" y="340"/>
+      <pos x="1680" y="360"/>
     </visualElement>
     <visualElement>
       <elementName>Add</elementName>
@@ -91,7 +91,7 @@
           <int>64</int>
         </entry>
       </elementAttributes>
-      <pos x="1420" y="300"/>
+      <pos x="1420" y="320"/>
     </visualElement>
     <visualElement>
       <elementName>In</elementName>
@@ -105,7 +105,7 @@
           <int>32</int>
         </entry>
       </elementAttributes>
-      <pos x="1120" y="400"/>
+      <pos x="1120" y="440"/>
     </visualElement>
     <visualElement>
       <elementName>BitExtender</elementName>
@@ -119,7 +119,7 @@
           <int>64</int>
         </entry>
       </elementAttributes>
-      <pos x="1220" y="400"/>
+      <pos x="1220" y="440"/>
     </visualElement>
     <visualElement>
       <elementName>In</elementName>
@@ -129,7 +129,7 @@
           <string>C_i</string>
         </entry>
       </elementAttributes>
-      <pos x="1120" y="440"/>
+      <pos x="1120" y="480"/>
     </visualElement>
     <visualElement>
       <elementName>Out</elementName>
@@ -139,114 +139,128 @@
           <string>C_o</string>
         </entry>
       </elementAttributes>
-      <pos x="1680" y="400"/>
+      <pos x="1680" y="420"/>
     </visualElement>
     <visualElement>
       <elementName>signed_mul.dig</elementName>
       <elementAttributes/>
       <pos x="1260" y="280"/>
     </visualElement>
+    <visualElement>
+      <elementName>In</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>S_b</string>
+        </entry>
+      </elementAttributes>
+      <pos x="1120" y="380"/>
+    </visualElement>
   </visualElements>
   <wires>
     <wire>
-      <p1 x="1620" y="320"/>
-      <p2 x="1660" y="320"/>
+      <p1 x="1320" y="320"/>
+      <p2 x="1420" y="320"/>
     </wire>
     <wire>
-      <p1 x="1360" y="320"/>
-      <p2 x="1420" y="320"/>
+      <p1 x="1620" y="320"/>
+      <p2 x="1660" y="320"/>
     </wire>
     <wire>
       <p1 x="1480" y="320"/>
-      <p2 x="1580" y="320"/>
+      <p2 x="1600" y="320"/>
     </wire>
     <wire>
-      <p1 x="1120" y="320"/>
-      <p2 x="1180" y="320"/>
+      <p1 x="1120" y="480"/>
+      <p2 x="1400" y="480"/>
     </wire>
     <wire>
-      <p1 x="1200" y="320"/>
-      <p2 x="1260" y="320"/>
+      <p1 x="1620" y="340"/>
+      <p2 x="1660" y="340"/>
     </wire>
     <wire>
-      <p1 x="1580" y="400"/>
-      <p2 x="1680" y="400"/>
+      <p1 x="1360" y="340"/>
+      <p2 x="1420" y="340"/>
     </wire>
     <wire>
-      <p1 x="1280" y="400"/>
-      <p2 x="1360" y="400"/>
+      <p1 x="1480" y="340"/>
+      <p2 x="1580" y="340"/>
     </wire>
     <wire>
-      <p1 x="1120" y="400"/>
-      <p2 x="1220" y="400"/>
+      <p1 x="1120" y="340"/>
+      <p2 x="1260" y="340"/>
     </wire>
     <wire>
-      <p1 x="1660" y="340"/>
-      <p2 x="1680" y="340"/>
+      <p1 x="1580" y="420"/>
+      <p2 x="1680" y="420"/>
     </wire>
     <wire>
-      <p1 x="1400" y="340"/>
-      <p2 x="1420" y="340"/>
+      <p1 x="1120" y="260"/>
+      <p2 x="1160" y="260"/>
     </wire>
     <wire>
-      <p1 x="1660" y="280"/>
-      <p2 x="1680" y="280"/>
+      <p1 x="1280" y="440"/>
+      <p2 x="1360" y="440"/>
     </wire>
     <wire>
-      <p1 x="1120" y="280"/>
-      <p2 x="1260" y="280"/>
+      <p1 x="1120" y="440"/>
+      <p2 x="1220" y="440"/>
     </wire>
     <wire>
-      <p1 x="1120" y="360"/>
-      <p2 x="1200" y="360"/>
+      <p1 x="1660" y="360"/>
+      <p2 x="1680" y="360"/>
     </wire>
     <wire>
-      <p1 x="1120" y="440"/>
-      <p2 x="1400" y="440"/>
+      <p1 x="1400" y="360"/>
+      <p2 x="1420" y="360"/>
     </wire>
     <wire>
-      <p1 x="1620" y="300"/>
-      <p2 x="1660" y="300"/>
+      <p1 x="1160" y="360"/>
+      <p2 x="1260" y="360"/>
     </wire>
     <wire>
-      <p1 x="1480" y="300"/>
-      <p2 x="1600" y="300"/>
+      <p1 x="1160" y="280"/>
+      <p2 x="1260" y="280"/>
     </wire>
     <wire>
-      <p1 x="1320" y="300"/>
-      <p2 x="1420" y="300"/>
+      <p1 x="1660" y="300"/>
+      <p2 x="1680" y="300"/>
     </wire>
     <wire>
-      <p1 x="1180" y="300"/>
+      <p1 x="1120" y="300"/>
       <p2 x="1260" y="300"/>
     </wire>
     <wire>
-      <p1 x="1360" y="320"/>
-      <p2 x="1360" y="400"/>
+      <p1 x="1120" y="380"/>
+      <p2 x="1160" y="380"/>
     </wire>
     <wire>
-      <p1 x="1200" y="320"/>
-      <p2 x="1200" y="360"/>
+      <p1 x="1360" y="340"/>
+      <p2 x="1360" y="440"/>
     </wire>
     <wire>
-      <p1 x="1400" y="340"/>
-      <p2 x="1400" y="440"/>
+      <p1 x="1400" y="360"/>
+      <p2 x="1400" y="480"/>
     </wire>
     <wire>
-      <p1 x="1580" y="320"/>
-      <p2 x="1580" y="400"/>
+      <p1 x="1160" y="260"/>
+      <p2 x="1160" y="280"/>
     </wire>
     <wire>
-      <p1 x="1660" y="280"/>
-      <p2 x="1660" y="300"/>
+      <p1 x="1160" y="360"/>
+      <p2 x="1160" y="380"/>
     </wire>
     <wire>
-      <p1 x="1660" y="320"/>
-      <p2 x="1660" y="340"/>
+      <p1 x="1580" y="340"/>
+      <p2 x="1580" y="420"/>
     </wire>
     <wire>
-      <p1 x="1180" y="300"/>
-      <p2 x="1180" y="320"/>
+      <p1 x="1660" y="300"/>
+      <p2 x="1660" y="320"/>
+    </wire>
+    <wire>
+      <p1 x="1660" y="340"/>
+      <p2 x="1660" y="360"/>
     </wire>
   </wires>
   <measurementOrdering/>
diff --git a/signed_mul.dig b/signed_mul.dig
index 4709ca4..7b4d881 100644
--- a/signed_mul.dig
+++ b/signed_mul.dig
@@ -18,10 +18,10 @@
       <elementAttributes>
         <entry>
           <string>Label</string>
-          <string>S</string>
+          <string>S_a</string>
         </entry>
       </elementAttributes>
-      <pos x="600" y="560"/>
+      <pos x="600" y="340"/>
     </visualElement>
     <visualElement>
       <elementName>In</elementName>
@@ -147,7 +147,7 @@
           <boolean>true</boolean>
         </entry>
       </elementAttributes>
-      <pos x="780" y="640"/>
+      <pos x="960" y="640"/>
     </visualElement>
     <visualElement>
       <elementName>And</elementName>
@@ -157,7 +157,7 @@
           <boolean>true</boolean>
         </entry>
       </elementAttributes>
-      <pos x="900" y="660"/>
+      <pos x="1100" y="660"/>
     </visualElement>
     <visualElement>
       <elementName>Neg</elementName>
@@ -218,6 +218,26 @@
       </elementAttributes>
       <pos x="1380" y="300"/>
     </visualElement>
+    <visualElement>
+      <elementName>In</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>S_b</string>
+        </entry>
+      </elementAttributes>
+      <pos x="600" y="560"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Or</elementName>
+      <elementAttributes>
+        <entry>
+          <string>wideShape</string>
+          <boolean>true</boolean>
+        </entry>
+      </elementAttributes>
+      <pos x="680" y="700"/>
+    </visualElement>
   </visualElements>
   <wires>
     <wire>
@@ -241,8 +261,12 @@
       <p2 x="1280" y="320"/>
     </wire>
     <wire>
-      <p1 x="760" y="640"/>
-      <p2 x="780" y="640"/>
+      <p1 x="900" y="320"/>
+      <p2 x="940" y="320"/>
+    </wire>
+    <wire>
+      <p1 x="900" y="640"/>
+      <p2 x="960" y="640"/>
     </wire>
     <wire>
       <p1 x="640" y="420"/>
@@ -252,25 +276,25 @@
       <p1 x="860" y="260"/>
       <p2 x="880" y="260"/>
     </wire>
+    <wire>
+      <p1 x="620" y="740"/>
+      <p2 x="680" y="740"/>
+    </wire>
     <wire>
       <p1 x="640" y="200"/>
       <p2 x="880" y="200"/>
     </wire>
     <wire>
       <p1 x="700" y="520"/>
-      <p2 x="760" y="520"/>
-    </wire>
-    <wire>
-      <p1 x="760" y="520"/>
       <p2 x="800" y="520"/>
     </wire>
     <wire>
-      <p1 x="740" y="680"/>
-      <p2 x="780" y="680"/>
+      <p1 x="1180" y="680"/>
+      <p2 x="1300" y="680"/>
     </wire>
     <wire>
-      <p1 x="980" y="680"/>
-      <p2 x="1300" y="680"/>
+      <p1 x="940" y="680"/>
+      <p2 x="960" y="680"/>
     </wire>
     <wire>
       <p1 x="1240" y="360"/>
@@ -282,16 +306,12 @@
     </wire>
     <wire>
       <p1 x="700" y="300"/>
-      <p2 x="740" y="300"/>
+      <p2 x="800" y="300"/>
     </wire>
     <wire>
       <p1 x="1320" y="300"/>
       <p2 x="1380" y="300"/>
     </wire>
-    <wire>
-      <p1 x="740" y="300"/>
-      <p2 x="800" y="300"/>
-    </wire>
     <wire>
       <p1 x="640" y="460"/>
       <p2 x="780" y="460"/>
@@ -302,10 +322,10 @@
     </wire>
     <wire>
       <p1 x="600" y="560"/>
-      <p2 x="620" y="560"/>
+      <p2 x="640" y="560"/>
     </wire>
     <wire>
-      <p1 x="620" y="560"/>
+      <p1 x="640" y="560"/>
       <p2 x="800" y="560"/>
     </wire>
     <wire>
@@ -325,13 +345,17 @@
       <p2 x="880" y="240"/>
     </wire>
     <wire>
-      <p1 x="620" y="720"/>
+      <p1 x="760" y="720"/>
       <p2 x="860" y="720"/>
     </wire>
     <wire>
       <p1 x="980" y="340"/>
       <p2 x="1040" y="340"/>
     </wire>
+    <wire>
+      <p1 x="600" y="340"/>
+      <p2 x="620" y="340"/>
+    </wire>
     <wire>
       <p1 x="620" y="340"/>
       <p2 x="800" y="340"/>
@@ -345,8 +369,8 @@
       <p2 x="680" y="500"/>
     </wire>
     <wire>
-      <p1 x="860" y="660"/>
-      <p2 x="900" y="660"/>
+      <p1 x="1040" y="660"/>
+      <p2 x="1100" y="660"/>
     </wire>
     <wire>
       <p1 x="600" y="280"/>
@@ -378,7 +402,11 @@
     </wire>
     <wire>
       <p1 x="860" y="700"/>
-      <p2 x="900" y="700"/>
+      <p2 x="1100" y="700"/>
+    </wire>
+    <wire>
+      <p1 x="640" y="700"/>
+      <p2 x="680" y="700"/>
     </wire>
     <wire>
       <p1 x="640" y="200"/>
@@ -388,6 +416,10 @@
       <p1 x="640" y="420"/>
       <p2 x="640" y="460"/>
     </wire>
+    <wire>
+      <p1 x="640" y="560"/>
+      <p2 x="640" y="700"/>
+    </wire>
     <wire>
       <p1 x="640" y="460"/>
       <p2 x="640" y="500"/>
@@ -404,6 +436,10 @@
       <p1 x="900" y="240"/>
       <p2 x="900" y="320"/>
     </wire>
+    <wire>
+      <p1 x="900" y="540"/>
+      <p2 x="900" y="640"/>
+    </wire>
     <wire>
       <p1 x="980" y="340"/>
       <p2 x="980" y="440"/>
@@ -412,10 +448,6 @@
       <p1 x="980" y="220"/>
       <p2 x="980" y="300"/>
     </wire>
-    <wire>
-      <p1 x="740" y="300"/>
-      <p2 x="740" y="680"/>
-    </wire>
     <wire>
       <p1 x="1140" y="280"/>
       <p2 x="1140" y="320"/>
@@ -432,18 +464,6 @@
       <p1 x="1240" y="320"/>
       <p2 x="1240" y="360"/>
     </wire>
-    <wire>
-      <p1 x="760" y="520"/>
-      <p2 x="760" y="640"/>
-    </wire>
-    <wire>
-      <p1 x="620" y="340"/>
-      <p2 x="620" y="560"/>
-    </wire>
-    <wire>
-      <p1 x="620" y="560"/>
-      <p2 x="620" y="720"/>
-    </wire>
     <wire>
       <p1 x="860" y="700"/>
       <p2 x="860" y="720"/>
@@ -452,6 +472,14 @@
       <p1 x="860" y="240"/>
       <p2 x="860" y="260"/>
     </wire>
+    <wire>
+      <p1 x="620" y="340"/>
+      <p2 x="620" y="740"/>
+    </wire>
+    <wire>
+      <p1 x="940" y="320"/>
+      <p2 x="940" y="680"/>
+    </wire>
   </wires>
   <measurementOrdering/>
 </circuit>
\ No newline at end of file
diff --git a/sreg.dig b/sreg.dig
index 4254b39..405e4dd 100644
--- a/sreg.dig
+++ b/sreg.dig
@@ -155,6 +155,42 @@
       </elementAttributes>
       <pos x="840" y="480"/>
     </visualElement>
+    <visualElement>
+      <elementName>In</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>S_i</string>
+        </entry>
+      </elementAttributes>
+      <pos x="200" y="500"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Out</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>S_o</string>
+        </entry>
+      </elementAttributes>
+      <pos x="840" y="520"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Text</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Description</string>
+          <string>Status Register
+
+Z : Zero flag
+C : Carry flag
+N : Negative flag (bit 31)
+V : Two&apos;s Complement Overflow flag
+S : True Sign (V xor N)</string>
+        </entry>
+      </elementAttributes>
+      <pos x="360" y="60"/>
+    </visualElement>
   </visualElements>
   <wires>
     <wire>
@@ -185,6 +221,10 @@
       <p1 x="320" y="520"/>
       <p2 x="340" y="520"/>
     </wire>
+    <wire>
+      <p1 x="760" y="520"/>
+      <p2 x="840" y="520"/>
+    </wire>
     <wire>
       <p1 x="200" y="460"/>
       <p2 x="260" y="460"/>
@@ -257,10 +297,6 @@
       <p1 x="200" y="420"/>
       <p2 x="240" y="420"/>
     </wire>
-    <wire>
-      <p1 x="320" y="420"/>
-      <p2 x="340" y="420"/>
-    </wire>
     <wire>
       <p1 x="440" y="420"/>
       <p2 x="480" y="420"/>
@@ -269,6 +305,10 @@
       <p1 x="720" y="420"/>
       <p2 x="780" y="420"/>
     </wire>
+    <wire>
+      <p1 x="280" y="420"/>
+      <p2 x="340" y="420"/>
+    </wire>
     <wire>
       <p1 x="320" y="740"/>
       <p2 x="340" y="740"/>
@@ -317,6 +357,10 @@
       <p1 x="320" y="500"/>
       <p2 x="340" y="500"/>
     </wire>
+    <wire>
+      <p1 x="200" y="500"/>
+      <p2 x="280" y="500"/>
+    </wire>
     <wire>
       <p1 x="320" y="760"/>
       <p2 x="340" y="760"/>
@@ -329,6 +373,10 @@
       <p1 x="800" y="440"/>
       <p2 x="840" y="440"/>
     </wire>
+    <wire>
+      <p1 x="720" y="440"/>
+      <p2 x="760" y="440"/>
+    </wire>
     <wire>
       <p1 x="200" y="380"/>
       <p2 x="220" y="380"/>
@@ -358,8 +406,8 @@
       <p2 x="240" y="420"/>
     </wire>
     <wire>
-      <p1 x="320" y="420"/>
-      <p2 x="320" y="440"/>
+      <p1 x="320" y="440"/>
+      <p2 x="320" y="460"/>
     </wire>
     <wire>
       <p1 x="320" y="580"/>
@@ -409,10 +457,6 @@
       <p1 x="320" y="940"/>
       <p2 x="320" y="960"/>
     </wire>
-    <wire>
-      <p1 x="320" y="440"/>
-      <p2 x="320" y="460"/>
-    </wire>
     <wire>
       <p1 x="320" y="700"/>
       <p2 x="320" y="720"/>
@@ -481,6 +525,14 @@
       <p1 x="820" y="380"/>
       <p2 x="820" y="400"/>
     </wire>
+    <wire>
+      <p1 x="280" y="420"/>
+      <p2 x="280" y="500"/>
+    </wire>
+    <wire>
+      <p1 x="760" y="440"/>
+      <p2 x="760" y="520"/>
+    </wire>
     <wire>
       <p1 x="220" y="360"/>
       <p2 x="220" y="380"/>