Add PPU and relevant memories

1 files changed, 634 insertions, 359 deletions

diff --git a/digital/atk16_ppu.dig b/digital/atk16_ppu.dig
index 17b9447..8f373a3 100644
--- a/digital/atk16_ppu.dig
+++ b/digital/atk16_ppu.dig
@@ -84,14 +84,14 @@
           <int>10</int>
         </entry>
       </elementAttributes>
-      <pos x="320" y="180"/>
+      <pos x="540" y="60"/>
     </visualElement>
     <visualElement>
       <elementName>Const</elementName>
       <elementAttributes>
         <entry>
           <string>Value</string>
-          <long>523</long>
+          <long>113</long>
         </entry>
         <entry>
           <string>Bits</string>
@@ -102,174 +102,201 @@
           <intFormat>dec</intFormat>
         </entry>
       </elementAttributes>
-      <pos x="300" y="200"/>
+      <pos x="520" y="80"/>
     </visualElement>
     <visualElement>
-      <elementName>Counter</elementName>
+      <elementName>Comparator</elementName>
       <elementAttributes>
         <entry>
           <string>Bits</string>
           <int>10</int>
         </entry>
       </elementAttributes>
-      <pos x="160" y="180"/>
+      <pos x="540" y="-20"/>
     </visualElement>
     <visualElement>
-      <elementName>VDD</elementName>
+      <elementName>Const</elementName>
       <elementAttributes>
         <entry>
-          <string>rotation</string>
-          <rotation reference="../../../../visualElement[4]/elementAttributes/entry/rotation"/>
+          <string>Value</string>
+          <long>16</long>
         </entry>
-      </elementAttributes>
-      <pos x="120" y="180"/>
-    </visualElement>
-    <visualElement>
-      <elementName>Comparator</elementName>
-      <elementAttributes>
         <entry>
           <string>Bits</string>
           <int>10</int>
         </entry>
+        <entry>
+          <string>intFormat</string>
+          <intFormat>dec</intFormat>
+        </entry>
       </elementAttributes>
-      <pos x="320" y="260"/>
+      <pos x="520" y="0"/>
     </visualElement>
     <visualElement>
-      <elementName>Const</elementName>
+      <elementName>NAnd</elementName>
+      <elementAttributes/>
+      <pos x="640" y="20"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Value</string>
-          <long>488</long>
+          <string>NetName</string>
+          <string>HSYNC</string>
         </entry>
+      </elementAttributes>
+      <pos x="740" y="40"/>
+    </visualElement>
+    <visualElement>
+      <elementName>In</elementName>
+      <elementAttributes>
         <entry>
-          <string>Bits</string>
-          <int>10</int>
+          <string>Description</string>
+          <string>Pixel clock</string>
         </entry>
         <entry>
-          <string>intFormat</string>
-          <intFormat>dec</intFormat>
+          <string>Label</string>
+          <string>PCLK</string>
         </entry>
       </elementAttributes>
-      <pos x="300" y="280"/>
+      <pos x="-60" y="420"/>
     </visualElement>
     <visualElement>
-      <elementName>Comparator</elementName>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Bits</string>
-          <int>10</int>
+          <string>NetName</string>
+          <string>PCLK</string>
         </entry>
       </elementAttributes>
-      <pos x="540" y="60"/>
+      <pos x="-40" y="420"/>
     </visualElement>
     <visualElement>
-      <elementName>Const</elementName>
+      <elementName>In</elementName>
       <elementAttributes>
         <entry>
-          <string>Value</string>
-          <long>751</long>
-        </entry>
-        <entry>
-          <string>Bits</string>
-          <int>10</int>
+          <string>Description</string>
+          <string>CPU clock</string>
         </entry>
         <entry>
-          <string>intFormat</string>
-          <intFormat>dec</intFormat>
+          <string>Label</string>
+          <string>CLK</string>
         </entry>
       </elementAttributes>
-      <pos x="520" y="80"/>
+      <pos x="-60" y="460"/>
     </visualElement>
     <visualElement>
-      <elementName>Comparator</elementName>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Bits</string>
-          <int>10</int>
+          <string>NetName</string>
+          <string>CLK</string>
         </entry>
       </elementAttributes>
-      <pos x="540" y="-20"/>
+      <pos x="-40" y="460"/>
     </visualElement>
     <visualElement>
-      <elementName>Const</elementName>
+      <elementName>RAMDualPort</elementName>
       <elementAttributes>
         <entry>
-          <string>Value</string>
-          <long>654</long>
+          <string>AddrBits</string>
+          <int>11</int>
         </entry>
         <entry>
-          <string>Bits</string>
-          <int>10</int>
+          <string>Label</string>
+          <string>SPRITE MEM</string>
         </entry>
         <entry>
-          <string>intFormat</string>
-          <intFormat>dec</intFormat>
+          <string>Bits</string>
+          <int>16</int>
         </entry>
       </elementAttributes>
-      <pos x="520" y="0"/>
+      <pos x="-220" y="-140"/>
     </visualElement>
     <visualElement>
-      <elementName>Comparator</elementName>
+      <elementName>Text</elementName>
       <elementAttributes>
         <entry>
-          <string>Bits</string>
-          <int>10</int>
+          <string>Description</string>
+          <string>(8 pixels wide x 8 pixels tall + 12 bit X + 12 bit Y + 8 bit priority)
+x 21 sprites
+&lt; 2**11 = 2048 words</string>
         </entry>
       </elementAttributes>
-      <pos x="320" y="340"/>
+      <pos x="-500" y="-320"/>
     </visualElement>
     <visualElement>
-      <elementName>Const</elementName>
+      <elementName>Text</elementName>
       <elementAttributes>
         <entry>
-          <string>Value</string>
-          <long>491</long>
+          <string>Description</string>
+          <string>2**11 selector addresses for
+sprite mem, starting from 0x0800</string>
         </entry>
+      </elementAttributes>
+      <pos x="-400" y="140"/>
+    </visualElement>
+    <visualElement>
+      <elementName>In</elementName>
+      <elementAttributes>
         <entry>
-          <string>Bits</string>
-          <int>10</int>
+          <string>Label</string>
+          <string>MMIO_IE</string>
         </entry>
+      </elementAttributes>
+      <pos x="-380" y="-100"/>
+    </visualElement>
+    <visualElement>
+      <elementName>In</elementName>
+      <elementAttributes>
         <entry>
-          <string>intFormat</string>
-          <intFormat>dec</intFormat>
+          <string>Label</string>
+          <string>MMIO_OE</string>
         </entry>
       </elementAttributes>
-      <pos x="300" y="360"/>
+      <pos x="-380" y="-60"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
+          <string>rotation</string>
+          <rotation rotation="2"/>
+        </entry>
+        <entry>
           <string>NetName</string>
-          <string>VSYNC</string>
+          <string>CLK</string>
         </entry>
       </elementAttributes>
-      <pos x="560" y="320"/>
+      <pos x="-240" y="-80"/>
     </visualElement>
     <visualElement>
-      <elementName>NAnd</elementName>
-      <elementAttributes/>
-      <pos x="640" y="20"/>
+      <elementName>In</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Description</string>
+          <string>Data bus</string>
+        </entry>
+        <entry>
+          <string>Label</string>
+          <string>DBUS</string>
+        </entry>
+        <entry>
+          <string>Bits</string>
+          <int>16</int>
+        </entry>
+      </elementAttributes>
+      <pos x="-60" y="380"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
           <string>NetName</string>
-          <string>HSYNC</string>
+          <string>DBUS</string>
         </entry>
       </elementAttributes>
-      <pos x="740" y="40"/>
-    </visualElement>
-    <visualElement>
-      <elementName>NAnd</elementName>
-      <elementAttributes/>
-      <pos x="420" y="300"/>
-    </visualElement>
-    <visualElement>
-      <elementName>VGA</elementName>
-      <elementAttributes/>
-      <pos x="760" y="160"/>
+      <pos x="-40" y="380"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
@@ -280,10 +307,10 @@
         </entry>
         <entry>
           <string>NetName</string>
-          <string>PCLK</string>
+          <string>DBUS</string>
         </entry>
       </elementAttributes>
-      <pos x="740" y="260"/>
+      <pos x="-240" y="-120"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
@@ -294,38 +321,74 @@
         </entry>
         <entry>
           <string>NetName</string>
-          <string>HSYNC</string>
+          <string>SMEMBUS</string>
         </entry>
       </elementAttributes>
-      <pos x="760" y="220"/>
+      <pos x="-240" y="-140"/>
     </visualElement>
     <visualElement>
-      <elementName>Tunnel</elementName>
+      <elementName>In</elementName>
       <elementAttributes>
         <entry>
-          <string>rotation</string>
-          <rotation rotation="2"/>
+          <string>Description</string>
+          <string>MMI/O selector</string>
         </entry>
         <entry>
-          <string>NetName</string>
-          <string>VSYNC</string>
+          <string>Label</string>
+          <string>MMIO_S</string>
+        </entry>
+        <entry>
+          <string>Bits</string>
+          <int>13</int>
         </entry>
       </elementAttributes>
-      <pos x="760" y="240"/>
+      <pos x="-360" y="40"/>
     </visualElement>
     <visualElement>
-      <elementName>Tunnel</elementName>
+      <elementName>Splitter</elementName>
       <elementAttributes>
         <entry>
-          <string>rotation</string>
-          <rotation rotation="2"/>
+          <string>Input Splitting</string>
+          <string>13</string>
         </entry>
         <entry>
+          <string>Output Splitting</string>
+          <string>11,1,1</string>
+        </entry>
+      </elementAttributes>
+      <pos x="-340" y="40"/>
+    </visualElement>
+    <visualElement>
+      <elementName>And</elementName>
+      <elementAttributes>
+        <entry>
+          <string>inverterConfig</string>
+          <inverterConfig>
+            <string>In_2</string>
+          </inverterConfig>
+        </entry>
+      </elementAttributes>
+      <pos x="-280" y="60"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Tunnel</elementName>
+      <elementAttributes>
+        <entry>
           <string>NetName</string>
-          <string>PR</string>
+          <string>SMEMBUS</string>
+        </entry>
+      </elementAttributes>
+      <pos x="-120" y="40"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Multiplexer</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Bits</string>
+          <int>11</int>
         </entry>
       </elementAttributes>
-      <pos x="740" y="160"/>
+      <pos x="-180" y="20"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
@@ -336,10 +399,10 @@
         </entry>
         <entry>
           <string>NetName</string>
-          <string>PG</string>
+          <string>SM_QUERY</string>
         </entry>
       </elementAttributes>
-      <pos x="740" y="180"/>
+      <pos x="-200" y="20"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
@@ -350,358 +413,514 @@
         </entry>
         <entry>
           <string>NetName</string>
-          <string>PB</string>
+          <string>SM_QUERY</string>
         </entry>
       </elementAttributes>
-      <pos x="740" y="200"/>
+      <pos x="-120" y="280"/>
     </visualElement>
     <visualElement>
-      <elementName>In</elementName>
+      <elementName>Ground</elementName>
       <elementAttributes>
         <entry>
-          <string>Description</string>
-          <string>Pixel clock</string>
+          <string>Bits</string>
+          <int>11</int>
         </entry>
+      </elementAttributes>
+      <pos x="-100" y="300"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Const</elementName>
+      <elementAttributes>
         <entry>
-          <string>Label</string>
-          <string>PCLK</string>
+          <string>Value</string>
+          <long>160</long>
+        </entry>
+        <entry>
+          <string>Bits</string>
+          <int>10</int>
+        </entry>
+        <entry>
+          <string>intFormat</string>
+          <intFormat>dec</intFormat>
         </entry>
       </elementAttributes>
-      <pos x="-60" y="420"/>
+      <pos x="520" y="160"/>
     </visualElement>
     <visualElement>
-      <elementName>Tunnel</elementName>
+      <elementName>Sub</elementName>
       <elementAttributes>
         <entry>
-          <string>NetName</string>
-          <string>PCLK</string>
+          <string>Bits</string>
+          <int>10</int>
         </entry>
       </elementAttributes>
-      <pos x="-40" y="420"/>
+      <pos x="540" y="140"/>
     </visualElement>
     <visualElement>
-      <elementName>Add</elementName>
+      <elementName>Ground</elementName>
+      <elementAttributes/>
+      <pos x="520" y="200"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Comparator</elementName>
       <elementAttributes>
         <entry>
           <string>Bits</string>
           <int>10</int>
         </entry>
       </elementAttributes>
-      <pos x="320" y="500"/>
+      <pos x="340" y="300"/>
     </visualElement>
     <visualElement>
       <elementName>Const</elementName>
       <elementAttributes>
         <entry>
+          <string>Value</string>
+          <long>523</long>
+        </entry>
+        <entry>
           <string>Bits</string>
           <int>10</int>
         </entry>
+        <entry>
+          <string>intFormat</string>
+          <intFormat>dec</intFormat>
+        </entry>
       </elementAttributes>
-      <pos x="300" y="520"/>
+      <pos x="320" y="320"/>
     </visualElement>
     <visualElement>
-      <elementName>In</elementName>
+      <elementName>Counter</elementName>
       <elementAttributes>
         <entry>
-          <string>Description</string>
-          <string>CPU clock</string>
-        </entry>
-        <entry>
-          <string>Label</string>
-          <string>CLK</string>
+          <string>Bits</string>
+          <int>10</int>
         </entry>
       </elementAttributes>
-      <pos x="-60" y="460"/>
+      <pos x="180" y="300"/>
     </visualElement>
     <visualElement>
-      <elementName>Tunnel</elementName>
+      <elementName>VDD</elementName>
       <elementAttributes>
         <entry>
-          <string>NetName</string>
-          <string>CLK</string>
+          <string>rotation</string>
+          <rotation rotation="1"/>
         </entry>
       </elementAttributes>
-      <pos x="-40" y="460"/>
+      <pos x="140" y="300"/>
     </visualElement>
     <visualElement>
-      <elementName>Ground</elementName>
-      <elementAttributes/>
-      <pos x="300" y="560"/>
+      <elementName>Comparator</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Bits</string>
+          <int>10</int>
+        </entry>
+      </elementAttributes>
+      <pos x="540" y="300"/>
     </visualElement>
     <visualElement>
-      <elementName>BarrelShifter</elementName>
+      <elementName>Const</elementName>
       <elementAttributes>
         <entry>
+          <string>Value</string>
+          <long>10</long>
+        </entry>
+        <entry>
           <string>Bits</string>
           <int>10</int>
         </entry>
         <entry>
-          <string>direction</string>
-          <direction>right</direction>
+          <string>intFormat</string>
+          <intFormat>dec</intFormat>
         </entry>
       </elementAttributes>
-      <pos x="300" y="-80"/>
+      <pos x="520" y="320"/>
     </visualElement>
     <visualElement>
-      <elementName>Const</elementName>
+      <elementName>Comparator</elementName>
       <elementAttributes>
         <entry>
           <string>Bits</string>
-          <int>4</int>
+          <int>10</int>
         </entry>
       </elementAttributes>
-      <pos x="280" y="-40"/>
+      <pos x="540" y="380"/>
     </visualElement>
     <visualElement>
-      <elementName>BarrelShifter</elementName>
+      <elementName>Const</elementName>
       <elementAttributes>
         <entry>
+          <string>Value</string>
+          <long>13</long>
+        </entry>
+        <entry>
           <string>Bits</string>
           <int>10</int>
         </entry>
         <entry>
-          <string>direction</string>
-          <direction>right</direction>
+          <string>intFormat</string>
+          <intFormat>dec</intFormat>
         </entry>
       </elementAttributes>
-      <pos x="200" y="480"/>
+      <pos x="520" y="400"/>
     </visualElement>
     <visualElement>
-      <elementName>Const</elementName>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Bits</string>
-          <int>4</int>
+          <string>NetName</string>
+          <string>VSYNC</string>
         </entry>
       </elementAttributes>
-      <pos x="180" y="520"/>
+      <pos x="780" y="360"/>
     </visualElement>
     <visualElement>
-      <elementName>Splitter</elementName>
+      <elementName>NAnd</elementName>
+      <elementAttributes/>
+      <pos x="640" y="340"/>
+    </visualElement>
+    <visualElement>
+      <elementName>VGA</elementName>
+      <elementAttributes/>
+      <pos x="-100" y="540"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Input Splitting</string>
-          <string>10</string>
+          <string>rotation</string>
+          <rotation rotation="2"/>
         </entry>
         <entry>
-          <string>Output Splitting</string>
-          <string>2,8</string>
+          <string>NetName</string>
+          <string>PCLK</string>
         </entry>
       </elementAttributes>
-      <pos x="420" y="440"/>
+      <pos x="-120" y="640"/>
     </visualElement>
     <visualElement>
-      <elementName>Splitter</elementName>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Input Splitting</string>
-          <string>10</string>
+          <string>rotation</string>
+          <rotation rotation="2"/>
         </entry>
         <entry>
-          <string>Output Splitting</string>
-          <string>1,9</string>
+          <string>NetName</string>
+          <string>HSYNC</string>
         </entry>
       </elementAttributes>
-      <pos x="420" y="540"/>
+      <pos x="-100" y="600"/>
     </visualElement>
     <visualElement>
-      <elementName>Out</elementName>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Description</string>
-          <string>Index of next scanline</string>
+          <string>rotation</string>
+          <rotation rotation="2"/>
         </entry>
         <entry>
-          <string>Label</string>
-          <string>SCANLINE</string>
+          <string>NetName</string>
+          <string>VSYNC</string>
+        </entry>
+      </elementAttributes>
+      <pos x="-100" y="620"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Tunnel</elementName>
+      <elementAttributes>
+        <entry>
+          <string>rotation</string>
+          <rotation rotation="2"/>
         </entry>
         <entry>
-          <string>Bits</string>
-          <int>9</int>
+          <string>NetName</string>
+          <string>PR</string>
         </entry>
       </elementAttributes>
-      <pos x="460" y="560"/>
+      <pos x="-120" y="540"/>
     </visualElement>
     <visualElement>
-      <elementName>Register</elementName>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Label</string>
-          <string>VWORD</string>
+          <string>rotation</string>
+          <rotation rotation="2"/>
         </entry>
         <entry>
-          <string>Bits</string>
-          <int>16</int>
+          <string>NetName</string>
+          <string>PG</string>
         </entry>
       </elementAttributes>
-      <pos x="460" y="-200"/>
+      <pos x="-120" y="560"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Tunnel</elementName>
+      <elementAttributes>
+        <entry>
+          <string>rotation</string>
+          <rotation rotation="2"/>
+        </entry>
+        <entry>
+          <string>NetName</string>
+          <string>PB</string>
+        </entry>
+      </elementAttributes>
+      <pos x="-120" y="580"/>
     </visualElement>
     <visualElement>
       <elementName>Const</elementName>
       <elementAttributes>
         <entry>
           <string>Value</string>
-          <long>16927</long>
+          <long>45</long>
         </entry>
         <entry>
           <string>Bits</string>
-          <int>16</int>
+          <int>10</int>
         </entry>
         <entry>
           <string>intFormat</string>
-          <intFormat>hex</intFormat>
+          <intFormat>dec</intFormat>
         </entry>
       </elementAttributes>
-      <pos x="440" y="-200"/>
+      <pos x="520" y="480"/>
     </visualElement>
     <visualElement>
-      <elementName>VDD</elementName>
+      <elementName>Sub</elementName>
       <elementAttributes>
         <entry>
-          <string>rotation</string>
-          <rotation rotation="1"/>
+          <string>Bits</string>
+          <int>10</int>
         </entry>
       </elementAttributes>
-      <pos x="440" y="-160"/>
+      <pos x="540" y="460"/>
     </visualElement>
     <visualElement>
-      <elementName>Tunnel</elementName>
+      <elementName>Ground</elementName>
+      <elementAttributes/>
+      <pos x="520" y="520"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Splitter</elementName>
       <elementAttributes>
         <entry>
-          <string>rotation</string>
-          <rotation rotation="2"/>
+          <string>Input Splitting</string>
+          <string>10</string>
+        </entry>
+        <entry>
+          <string>Output Splitting</string>
+          <string>9,1</string>
         </entry>
+      </elementAttributes>
+      <pos x="640" y="460"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Tunnel</elementName>
+      <elementAttributes>
         <entry>
           <string>NetName</string>
-          <string>CLK</string>
+          <string>Y</string>
         </entry>
       </elementAttributes>
-      <pos x="440" y="-180"/>
+      <pos x="700" y="460"/>
     </visualElement>
     <visualElement>
       <elementName>Splitter</elementName>
       <elementAttributes>
         <entry>
           <string>Input Splitting</string>
-          <string>16</string>
+          <string>10</string>
         </entry>
         <entry>
           <string>Output Splitting</string>
-          <string>4*4</string>
+          <string>9,1</string>
         </entry>
       </elementAttributes>
-      <pos x="600" y="-240"/>
+      <pos x="640" y="140"/>
     </visualElement>
     <visualElement>
-      <elementName>Multiplexer</elementName>
+      <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>Selector Bits</string>
-          <int>2</int>
+          <string>NetName</string>
+          <string>X</string>
         </entry>
+      </elementAttributes>
+      <pos x="700" y="140"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Text</elementName>
+      <elementAttributes>
         <entry>
-          <string>Bits</string>
-          <int>4</int>
+          <string>Description</string>
+          <string>Div 2</string>
         </entry>
       </elementAttributes>
-      <pos x="620" y="-240"/>
+      <pos x="620" y="180"/>
     </visualElement>
     <visualElement>
-      <elementName>Splitter</elementName>
+      <elementName>Text</elementName>
       <elementAttributes>
         <entry>
-          <string>Input Splitting</string>
-          <string>4</string>
+          <string>Description</string>
+          <string>Div 2</string>
         </entry>
+      </elementAttributes>
+      <pos x="640" y="500"/>
+    </visualElement>
+    <visualElement>
+      <elementName>RAMDualPort</elementName>
+      <elementAttributes>
         <entry>
-          <string>Output Splitting</string>
-          <string>1*4</string>
+          <string>AddrBits</string>
+          <int>9</int>
+        </entry>
+        <entry>
+          <string>Label</string>
+          <string>SCAN BUFFER</string>
+        </entry>
+        <entry>
+          <string>Bits</string>
+          <int>4</int>
         </entry>
       </elementAttributes>
-      <pos x="700" y="-200"/>
+      <pos x="80" y="-180"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
+          <string>rotation</string>
+          <rotation rotation="2"/>
+        </entry>
+        <entry>
           <string>NetName</string>
-          <string>PG</string>
+          <string>X</string>
         </entry>
       </elementAttributes>
-      <pos x="760" y="-180"/>
+      <pos x="60" y="-180"/>
     </visualElement>
     <visualElement>
-      <elementName>Tunnel</elementName>
+      <elementName>Ground</elementName>
       <elementAttributes>
         <entry>
-          <string>NetName</string>
-          <string>PB</string>
+          <string>Bits</string>
+          <int>4</int>
         </entry>
       </elementAttributes>
-      <pos x="760" y="-200"/>
+      <pos x="0" y="-140"/>
     </visualElement>
     <visualElement>
-      <elementName>Tunnel</elementName>
+      <elementName>Ground</elementName>
+      <elementAttributes/>
+      <pos x="20" y="-120"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Ground</elementName>
+      <elementAttributes/>
+      <pos x="40" y="-100"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Ground</elementName>
+      <elementAttributes/>
+      <pos x="60" y="-80"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Splitter</elementName>
       <elementAttributes>
         <entry>
-          <string>NetName</string>
-          <string>PR</string>
+          <string>mirror</string>
+          <boolean>true</boolean>
+        </entry>
+        <entry>
+          <string>Input Splitting</string>
+          <string>4</string>
+        </entry>
+        <entry>
+          <string>Output Splitting</string>
+          <string>1*4</string>
         </entry>
       </elementAttributes>
-      <pos x="760" y="-160"/>
+      <pos x="180" y="-140"/>
+    </visualElement>
+    <visualElement>
+      <elementName>atk16_ppu_palette.dig</elementName>
+      <elementAttributes/>
+      <pos x="260" y="-200"/>
     </visualElement>
     <visualElement>
-      <elementName>Add</elementName>
+      <elementName>Splitter</elementName>
       <elementAttributes>
         <entry>
-          <string>Bits</string>
-          <int>2</int>
+          <string>Input Splitting</string>
+          <string>1,1</string>
+        </entry>
+        <entry>
+          <string>Output Splitting</string>
+          <string>2</string>
         </entry>
       </elementAttributes>
-      <pos x="520" y="-100"/>
+      <pos x="380" y="-200"/>
     </visualElement>
     <visualElement>
-      <elementName>Ground</elementName>
-      <elementAttributes/>
-      <pos x="500" y="-40"/>
+      <elementName>Splitter</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Input Splitting</string>
+          <string>1,1</string>
+        </entry>
+        <entry>
+          <string>Output Splitting</string>
+          <string>2</string>
+        </entry>
+      </elementAttributes>
+      <pos x="380" y="-160"/>
     </visualElement>
     <visualElement>
       <elementName>Splitter</elementName>
       <elementAttributes>
         <entry>
           <string>Input Splitting</string>
-          <string>10</string>
+          <string>1,1</string>
         </entry>
         <entry>
           <string>Output Splitting</string>
-          <string>2,8</string>
+          <string>2</string>
         </entry>
       </elementAttributes>
-      <pos x="400" y="-60"/>
+      <pos x="380" y="-120"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
           <string>NetName</string>
-          <string>SCAN_L2</string>
+          <string>PR</string>
         </entry>
       </elementAttributes>
-      <pos x="460" y="440"/>
+      <pos x="420" y="-200"/>
     </visualElement>
     <visualElement>
       <elementName>Tunnel</elementName>
       <elementAttributes>
         <entry>
-          <string>rotation</string>
-          <rotation rotation="2"/>
+          <string>NetName</string>
+          <string>PG</string>
         </entry>
+      </elementAttributes>
+      <pos x="420" y="-160"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Tunnel</elementName>
+      <elementAttributes>
         <entry>
           <string>NetName</string>
-          <string>SCAN_L2</string>
+          <string>PB</string>
         </entry>
       </elementAttributes>
-      <pos x="500" y="-100"/>
+      <pos x="420" y="-120"/>
     </visualElement>
   </visualElements>
   <wires>
@@ -726,70 +945,94 @@
       <p2 x="340" y="0"/>
     </wire>
     <wire>
-      <p1 x="500" y="320"/>
-      <p2 x="560" y="320"/>
-    </wire>
-    <wire>
-      <p1 x="240" y="260"/>
-      <p2 x="320" y="260"/>
+      <p1 x="320" y="320"/>
+      <p2 x="340" y="320"/>
     </wire>
     <wire>
-      <p1 x="380" y="260"/>
-      <p2 x="400" y="260"/>
+      <p1 x="100" y="320"/>
+      <p2 x="180" y="320"/>
     </wire>
     <wire>
-      <p1 x="740" y="260"/>
-      <p2 x="760" y="260"/>
+      <p1 x="520" y="320"/>
+      <p2 x="540" y="320"/>
     </wire>
     <wire>
-      <p1 x="440" y="-200"/>
-      <p2 x="460" y="-200"/>
+      <p1 x="-120" y="640"/>
+      <p2 x="-100" y="640"/>
     </wire>
     <wire>
-      <p1 x="660" y="-200"/>
-      <p2 x="700" y="-200"/>
+      <p1 x="-120" y="580"/>
+      <p2 x="-100" y="580"/>
     </wire>
     <wire>
-      <p1 x="720" y="-200"/>
-      <p2 x="760" y="-200"/>
+      <p1 x="200" y="-200"/>
+      <p2 x="260" y="-200"/>
     </wire>
     <wire>
-      <p1 x="300" y="200"/>
-      <p2 x="320" y="200"/>
+      <p1 x="400" y="-200"/>
+      <p2 x="420" y="-200"/>
     </wire>
     <wire>
-      <p1 x="100" y="200"/>
-      <p2 x="160" y="200"/>
+      <p1 x="-240" y="-140"/>
+      <p2 x="-220" y="-140"/>
     </wire>
     <wire>
-      <p1 x="740" y="200"/>
-      <p2 x="760" y="200"/>
+      <p1 x="20" y="-140"/>
+      <p2 x="80" y="-140"/>
     </wire>
     <wire>
-      <p1 x="300" y="520"/>
-      <p2 x="320" y="520"/>
+      <p1 x="140" y="-140"/>
+      <p2 x="180" y="-140"/>
     </wire>
     <wire>
-      <p1 x="180" y="520"/>
-      <p2 x="200" y="520"/>
+      <p1 x="200" y="-140"/>
+      <p2 x="260" y="-140"/>
     </wire>
     <wire>
       <p1 x="-60" y="460"/>
       <p2 x="-40" y="460"/>
     </wire>
     <wire>
-      <p1 x="260" y="-80"/>
-      <p2 x="300" y="-80"/>
+      <p1 x="660" y="460"/>
+      <p2 x="700" y="460"/>
+    </wire>
+    <wire>
+      <p1 x="600" y="460"/>
+      <p2 x="640" y="460"/>
+    </wire>
+    <wire>
+      <p1 x="440" y="460"/>
+      <p2 x="540" y="460"/>
+    </wire>
+    <wire>
+      <p1 x="440" y="140"/>
+      <p2 x="540" y="140"/>
+    </wire>
+    <wire>
+      <p1 x="660" y="140"/>
+      <p2 x="700" y="140"/>
+    </wire>
+    <wire>
+      <p1 x="600" y="140"/>
+      <p2 x="640" y="140"/>
     </wire>
     <wire>
-      <p1 x="440" y="-80"/>
-      <p2 x="520" y="-80"/>
+      <p1 x="-240" y="-80"/>
+      <p2 x="-220" y="-80"/>
     </wire>
     <wire>
       <p1 x="520" y="80"/>
       <p2 x="540" y="80"/>
     </wire>
     <wire>
+      <p1 x="-220" y="80"/>
+      <p2 x="-160" y="80"/>
+    </wire>
+    <wire>
+      <p1 x="520" y="400"/>
+      <p2 x="540" y="400"/>
+    </wire>
+    <wire>
       <p1 x="600" y="-20"/>
       <p2 x="620" y="-20"/>
     </wire>
@@ -810,60 +1053,56 @@
       <p2 x="640" y="20"/>
     </wire>
     <wire>
-      <p1 x="180" y="340"/>
-      <p2 x="240" y="340"/>
-    </wire>
-    <wire>
-      <p1 x="400" y="340"/>
-      <p2 x="420" y="340"/>
+      <p1 x="-200" y="20"/>
+      <p2 x="-180" y="20"/>
     </wire>
     <wire>
-      <p1 x="240" y="340"/>
-      <p2 x="320" y="340"/>
+      <p1 x="160" y="340"/>
+      <p2 x="180" y="340"/>
     </wire>
     <wire>
-      <p1 x="300" y="280"/>
-      <p2 x="320" y="280"/>
+      <p1 x="620" y="340"/>
+      <p2 x="640" y="340"/>
     </wire>
     <wire>
-      <p1 x="140" y="220"/>
-      <p2 x="160" y="220"/>
+      <p1 x="-120" y="280"/>
+      <p2 x="-100" y="280"/>
     </wire>
     <wire>
-      <p1 x="300" y="540"/>
-      <p2 x="320" y="540"/>
+      <p1 x="160" y="280"/>
+      <p2 x="420" y="280"/>
     </wire>
     <wire>
-      <p1 x="400" y="540"/>
-      <p2 x="420" y="540"/>
+      <p1 x="-120" y="540"/>
+      <p2 x="-100" y="540"/>
     </wire>
     <wire>
-      <p1 x="440" y="-160"/>
-      <p2 x="460" y="-160"/>
+      <p1 x="0" y="-160"/>
+      <p2 x="80" y="-160"/>
     </wire>
     <wire>
-      <p1 x="720" y="-160"/>
-      <p2 x="760" y="-160"/>
+      <p1 x="200" y="-160"/>
+      <p2 x="260" y="-160"/>
     </wire>
     <wire>
-      <p1 x="140" y="160"/>
-      <p2 x="400" y="160"/>
+      <p1 x="400" y="-160"/>
+      <p2 x="420" y="-160"/>
     </wire>
     <wire>
-      <p1 x="740" y="160"/>
-      <p2 x="760" y="160"/>
+      <p1 x="520" y="160"/>
+      <p2 x="540" y="160"/>
     </wire>
     <wire>
-      <p1 x="180" y="480"/>
-      <p2 x="200" y="480"/>
+      <p1 x="520" y="480"/>
+      <p2 x="540" y="480"/>
     </wire>
     <wire>
-      <p1 x="500" y="-100"/>
-      <p2 x="520" y="-100"/>
+      <p1 x="-380" y="-100"/>
+      <p2 x="-220" y="-100"/>
     </wire>
     <wire>
-      <p1 x="580" y="-100"/>
-      <p2 x="640" y="-100"/>
+      <p1 x="60" y="-100"/>
+      <p2 x="80" y="-100"/>
     </wire>
     <wire>
       <p1 x="600" y="100"/>
@@ -874,12 +1113,16 @@
       <p2 x="420" y="100"/>
     </wire>
     <wire>
+      <p1 x="-320" y="100"/>
+      <p2 x="-300" y="100"/>
+    </wire>
+    <wire>
       <p1 x="-60" y="420"/>
       <p2 x="-40" y="420"/>
     </wire>
     <wire>
-      <p1 x="280" y="-40"/>
-      <p2 x="300" y="-40"/>
+      <p1 x="600" y="420"/>
+      <p2 x="620" y="420"/>
     </wire>
     <wire>
       <p1 x="100" y="40"/>
@@ -890,88 +1133,100 @@
       <p2 x="740" y="40"/>
     </wire>
     <wire>
+      <p1 x="-360" y="40"/>
+      <p2 x="-340" y="40"/>
+    </wire>
+    <wire>
+      <p1 x="-320" y="40"/>
+      <p2 x="-200" y="40"/>
+    </wire>
+    <wire>
+      <p1 x="-140" y="40"/>
+      <p2 x="-120" y="40"/>
+    </wire>
+    <wire>
       <p1 x="160" y="40"/>
       <p2 x="180" y="40"/>
     </wire>
     <wire>
-      <p1 x="300" y="360"/>
-      <p2 x="320" y="360"/>
+      <p1 x="720" y="360"/>
+      <p2 x="780" y="360"/>
     </wire>
     <wire>
-      <p1 x="400" y="300"/>
-      <p2 x="420" y="300"/>
+      <p1 x="240" y="300"/>
+      <p2 x="260" y="300"/>
     </wire>
     <wire>
-      <p1 x="560" y="-240"/>
-      <p2 x="600" y="-240"/>
+      <p1 x="400" y="300"/>
+      <p2 x="420" y="300"/>
     </wire>
     <wire>
-      <p1 x="440" y="560"/>
-      <p2 x="460" y="560"/>
+      <p1 x="140" y="300"/>
+      <p2 x="180" y="300"/>
     </wire>
     <wire>
-      <p1 x="440" y="-180"/>
-      <p2 x="460" y="-180"/>
+      <p1 x="600" y="300"/>
+      <p2 x="620" y="300"/>
     </wire>
     <wire>
-      <p1 x="520" y="-180"/>
-      <p2 x="560" y="-180"/>
+      <p1 x="440" y="300"/>
+      <p2 x="540" y="300"/>
     </wire>
     <wire>
-      <p1 x="720" y="-180"/>
-      <p2 x="760" y="-180"/>
+      <p1 x="260" y="300"/>
+      <p2 x="340" y="300"/>
     </wire>
     <wire>
-      <p1 x="220" y="180"/>
-      <p2 x="240" y="180"/>
+      <p1 x="-120" y="560"/>
+      <p2 x="-100" y="560"/>
     </wire>
     <wire>
-      <p1 x="380" y="180"/>
-      <p2 x="400" y="180"/>
+      <p1 x="60" y="-180"/>
+      <p2 x="80" y="-180"/>
     </wire>
     <wire>
-      <p1 x="120" y="180"/>
-      <p2 x="160" y="180"/>
+      <p1 x="200" y="-180"/>
+      <p2 x="260" y="-180"/>
     </wire>
     <wire>
-      <p1 x="740" y="180"/>
-      <p2 x="760" y="180"/>
+      <p1 x="520" y="180"/>
+      <p2 x="540" y="180"/>
     </wire>
     <wire>
-      <p1 x="240" y="180"/>
-      <p2 x="320" y="180"/>
+      <p1 x="520" y="500"/>
+      <p2 x="540" y="500"/>
     </wire>
     <wire>
-      <p1 x="260" y="500"/>
-      <p2 x="320" y="500"/>
+      <p1 x="-240" y="-120"/>
+      <p2 x="-220" y="-120"/>
     </wire>
     <wire>
-      <p1 x="380" y="500"/>
-      <p2 x="400" y="500"/>
+      <p1 x="40" y="-120"/>
+      <p2 x="80" y="-120"/>
     </wire>
     <wire>
-      <p1 x="400" y="440"/>
-      <p2 x="420" y="440"/>
+      <p1 x="400" y="-120"/>
+      <p2 x="420" y="-120"/>
     </wire>
     <wire>
-      <p1 x="440" y="440"/>
-      <p2 x="460" y="440"/>
+      <p1 x="-380" y="-60"/>
+      <p2 x="-220" y="-60"/>
     </wire>
     <wire>
-      <p1 x="360" y="-60"/>
-      <p2 x="400" y="-60"/>
+      <p1 x="-60" y="380"/>
+      <p2 x="-40" y="380"/>
     </wire>
     <wire>
-      <p1 x="500" y="-60"/>
-      <p2 x="520" y="-60"/>
+      <p1 x="620" y="380"/>
+      <p2 x="640" y="380"/>
     </wire>
     <wire>
-      <p1 x="420" y="-60"/>
-      <p2 x="440" y="-60"/>
+      <p1 x="260" y="380"/>
+      <p2 x="440" y="380"/>
     </wire>
     <wire>
-      <p1 x="380" y="380"/>
-      <p2 x="400" y="380"/>
+      <p1 x="440" y="380"/>
+      <p2 x="540" y="380"/>
     </wire>
     <wire>
       <p1 x="260" y="60"/>
@@ -982,6 +1237,14 @@
       <p2 x="640" y="60"/>
     </wire>
     <wire>
+      <p1 x="-320" y="60"/>
+      <p2 x="-280" y="60"/>
+    </wire>
+    <wire>
+      <p1 x="-200" y="60"/>
+      <p2 x="-180" y="60"/>
+    </wire>
+    <wire>
       <p1 x="440" y="60"/>
       <p2 x="540" y="60"/>
     </wire>
@@ -990,88 +1253,100 @@
       <p2 x="160" y="100"/>
     </wire>
     <wire>
-      <p1 x="640" y="-160"/>
-      <p2 x="640" y="-100"/>
+      <p1 x="160" y="280"/>
+      <p2 x="160" y="340"/>
+    </wire>
+    <wire>
+      <p1 x="0" y="-160"/>
+      <p2 x="0" y="-140"/>
+    </wire>
+    <wire>
+      <p1 x="-100" y="280"/>
+      <p2 x="-100" y="300"/>
     </wire>
     <wire>
       <p1 x="100" y="40"/>
-      <p2 x="100" y="200"/>
+      <p2 x="100" y="320"/>
     </wire>
     <wire>
       <p1 x="420" y="0"/>
       <p2 x="420" y="100"/>
     </wire>
     <wire>
-      <p1 x="260" y="-80"/>
-      <p2 x="260" y="0"/>
+      <p1 x="420" y="280"/>
+      <p2 x="420" y="300"/>
+    </wire>
+    <wire>
+      <p1 x="260" y="300"/>
+      <p2 x="260" y="380"/>
     </wire>
     <wire>
       <p1 x="260" y="0"/>
       <p2 x="260" y="60"/>
     </wire>
     <wire>
-      <p1 x="620" y="60"/>
-      <p2 x="620" y="100"/>
+      <p1 x="-200" y="40"/>
+      <p2 x="-200" y="60"/>
     </wire>
     <wire>
-      <p1 x="620" y="-20"/>
-      <p2 x="620" y="20"/>
+      <p1 x="520" y="180"/>
+      <p2 x="520" y="200"/>
     </wire>
     <wire>
-      <p1 x="140" y="160"/>
-      <p2 x="140" y="220"/>
+      <p1 x="520" y="500"/>
+      <p2 x="520" y="520"/>
     </wire>
     <wire>
-      <p1 x="300" y="540"/>
-      <p2 x="300" y="560"/>
+      <p1 x="40" y="-120"/>
+      <p2 x="40" y="-100"/>
     </wire>
     <wire>
-      <p1 x="400" y="160"/>
-      <p2 x="400" y="180"/>
+      <p1 x="620" y="60"/>
+      <p2 x="620" y="100"/>
     </wire>
     <wire>
-      <p1 x="400" y="340"/>
-      <p2 x="400" y="380"/>
+      <p1 x="620" y="-20"/>
+      <p2 x="620" y="20"/>
     </wire>
     <wire>
-      <p1 x="400" y="260"/>
-      <p2 x="400" y="300"/>
+      <p1 x="620" y="380"/>
+      <p2 x="620" y="420"/>
     </wire>
     <wire>
-      <p1 x="400" y="440"/>
-      <p2 x="400" y="500"/>
+      <p1 x="620" y="300"/>
+      <p2 x="620" y="340"/>
     </wire>
     <wire>
-      <p1 x="400" y="500"/>
-      <p2 x="400" y="540"/>
+      <p1 x="20" y="-140"/>
+      <p2 x="20" y="-120"/>
     </wire>
     <wire>
-      <p1 x="240" y="180"/>
-      <p2 x="240" y="260"/>
+      <p1 x="440" y="-20"/>
+      <p2 x="440" y="60"/>
     </wire>
     <wire>
-      <p1 x="240" y="260"/>
-      <p2 x="240" y="340"/>
+      <p1 x="440" y="300"/>
+      <p2 x="440" y="380"/>
     </wire>
     <wire>
-      <p1 x="560" y="-240"/>
-      <p2 x="560" y="-180"/>
+      <p1 x="440" y="60"/>
+      <p2 x="440" y="140"/>
     </wire>
     <wire>
-      <p1 x="180" y="340"/>
-      <p2 x="180" y="480"/>
+      <p1 x="440" y="380"/>
+      <p2 x="440" y="460"/>
     </wire>
     <wire>
-      <p1 x="500" y="-60"/>
-      <p2 x="500" y="-40"/>
+      <p1 x="60" y="-100"/>
+      <p2 x="60" y="-80"/>
     </wire>
     <wire>
-      <p1 x="440" y="-20"/>
-      <p2 x="440" y="60"/>
+      <p1 x="-320" y="80"/>
+      <p2 x="-320" y="100"/>
     </wire>
     <wire>
-      <p1 x="440" y="-80"/>
-      <p2 x="440" y="-60"/>
+      <p1 x="-160" y="60"/>
+      <p2 x="-160" y="80"/>
     </wire>
   </wires>
   <measurementOrdering/>