Add VRAM Tile Data table for layout of sprites and BG/WIN (#283)

* Add VRAM Tile Data table for layout of sprites and BG/WIN

Author: bbbbbr

content/Video_Display.md

@@ -473,9 +473,50 @@ don't use color 0 - it's transparent instead.
 
 There are three "blocks" of 128 tiles each:
 
--   Block 0 is $8000-$87FF
--   Block 1 is $8800-$8FFF
--   Block 2 is $9000-$97FF
+<table>
+  <thead>
+    <tr>
+      <th>Block</th>
+      <th>VRAM Address</th>
+      <th>Sprite Tiles</th>
+      <th colspan="2">BG/Win Tiles</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td></td>
+      <td></td>
+      <td></td>
+      <td><strong>if LCDC.4=1</strong></td>
+      <td><strong>if LCDC.4=0</strong></td>
+    </tr>
+    <tr>
+      <td>0</td>
+      <td>$8000 - $87FF</td>
+      <td>0 - 127</td>
+      <td>0 - 127</td>
+      <td></td>
+    </tr>
+    <tr>
+      <td>1</td>
+      <td>$8800 - $8FFF</td>
+      <td>128 - 255</td>
+      <td>128 - 255</td>
+      <td>
+        128 - 255 <br />
+        or (-127 - 0)
+      </td>
+    </tr>
+    <tr>
+      <td>2</td>
+      <td>$9000 - $97FF</td>
+      <td></td>
+      <td>(unused)</td>
+      <td>0 - 127</td>
+    </tr>
+  </tbody>
+</table>
+
 
 Tiles are always indexed using a 8-bit integer, but the addressing
 method may differ. The "$8000 method" uses \$8000 as its base pointer