docs/landscape_grid.html

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   6   <title>OpenTTD Landscape Internals - #2</title>
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   8     span.free     { font-family: "Courier New", Courier, mono; background-color: rgb( 70, 190,  70); }
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  23 <h3 style="font-weight: bold;">Landscape</h3>
  24 <span style="font-weight: bold;"></span>Nine attributes hold the information about a tile.
  25 This can be seen in the <a href="landscape.html">Landscape</a> document. This page tries to give an overview of used and free bits of
  26 the array so you can quickly see what is used and what is not.
  27
  28 <ul>
  29   <li><span style="font-weight: bold;">type</span> - 8 bits in size, tile class (bits 4..7), bridge (bits 2..3) tropic zone (bits 0..1, only valid in tropic climate)</li>
  30   <li><span style="font-weight: bold;">height</span> - 8 bits in size, stores tile height</li>
  31   <li><span style="font-weight: bold;">m1</span> - 8 bits in size, used to identify the owner of that tile (eg piece of rail, bridge, etc.)</li>
  32   <li><span style="font-weight: bold;">m2</span> - 16 bits in size, used to identify the index of the given tile (object) in the (object-)array</li>
  33   <li><span style="font-weight: bold;">m3</span> - 8 bits in size, is used for general storage</li>
  34   <li><span style="font-weight: bold;">m4</span> - 8 bits in size, is used for general storage</li>
  35   <li><span style="font-weight: bold;">m5</span> - 8 bits in size, is used for general storage</li>
  36   <li><span style="font-weight: bold;">m6</span> - 8 bits in size, is used for general storage</li>
  37   <li><span style="font-weight: bold;">m7</span> - 8 bits in size, is used for general storage</li>
  38   <li><span style="font-weight: bold;">m8</span> - 16 bits in size, is used for general storage</li>
  39 </ul>
  40 <p>
  41 <ul>
  42   <li><span style="font-weight: bold;"><span class="free">O</span></span> - bit is free</li>
  43   <li><span style="font-weight: bold;"><span class="usable">X</span></span> - bit is used, but could be freed if needed</li>
  44   <li><span style="font-weight: bold;"><span class="used">X</span></span> - bit is used</li>
  45   <li><span style="font-weight: bold;"><span class="pool">X</span></span> - bit is used for an index on a pool</li>
  46   <li><span style="font-weight: bold;"><span class="patch">X</span></span> - bit is introduced by a patch</li>
  47   <li><span style="font-weight: bold;"><span class="abuse">X</span></span> - bit of attribute is abused for different purposes, i.e. other bits define the actual meaning</li>
  48   <li><span style="font-weight: bold;"><span class="rearrange">X</span></span> - bit is accessed, but a rearrangement of the map array could free some of these bits (probably not done for bit alignment)</li>
  49 </ul>
  50
  51 <table align=center border="1" cellpadding="2" cellspacing="2">
  52   <tbody>
  53     <tr>
  54       <th colspan=2>class</th>
  55       <th>type (8)</th>
  56       <th>height (8)</th>
  57       <th>m1 (8)</th>
  58       <th>m2 (16)</th>
  59       <th>m3 (8)</th>
  60       <th>m4 (8)</th>
  61       <th>m5 (8)</th>
  62       <th>m6 (8)</th>
  63       <th>m7 (8)</th>
  64       <th>m8 (16)</th>
  65     </tr>
  66     <tr>
  67       <td colspan=2 class="caption">bits</td>
  68       <td class="bits">7654 3210</td>
  69       <td class="bits">7654 3210</td>
  70       <td class="bits">7654 3210</td>
  71       <td class="bits">FEDC BA98 7654 3210</td>
  72       <td class="bits">7654 3210</td>
  73       <td class="bits">7654 3210</td>
  74       <td class="bits">7654 3210</td>
  75       <td class="bits">7654 3210</td>
  76       <td class="bits">7654 3210</td>
  77       <td class="bits">FEDC BA98 7654 3210</td>
  78     </tr>
  79     <tr>
  80       <td rowspan="2">0</td>
  81       <td class="caption">ground</td>
  82       <td class="bits" rowspan=28><span class="used" title="Tile type">XXXX</span> <span class="used" title="Presence and direction of bridge above">XX</span> <span class="used" title="Tropic Zone: only meaningful in tropic climate. It contains the definition of the available zones">XX</span></td>
  83       <td class="bits" rowspan=28><span class="used" title="Tile height">XXXX XXXX</span></td>
  84       <td class="bits" rowspan=2><span class="free">OOO</span><span class="usable" title="Owner (always OWNER_NONE)">1 OOOO</span></td>
  85       <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td>
  86       <td class="bits"><span class="used" title="Type of hedge on NE border">XXX</span> <span class="used" title="Snow presence">X</span><span class="free">OOOO</span></td>
  87       <td class="bits" rowspan=2><span class="used" title="Type of hedge on SW border">XXX</span> <span class="used" title="Type of hedge on SE border">XXX</span><span class="free">OO</span></td>
  88       <td class="bits" rowspan=2><span class="used" title="Update counter">XXX</span> <span class="used" title="Type: grass, rough land, rocks, fields, snow, desert">XXX</span> <span class="used" title="Density">XX</span></td><td class="bits" rowspan=2><span class="free" >OOO</span><span class="used" title="Type of hedge on NW border">X XX</span><span class="free">OO</span></td>
  89       <td class="bits" rowspan=2><span class="free">OOOO OOOO</span></td>
  90       <td class="bits" rowspan=2><span class="free">OOOO OOOO OOOO OOOO</span></td>
  91     </tr>
  92     <tr>
  93       <td class="caption">farmland</td>
  94       <td class="bits"><span class="pool" title="Industry index on pool">XXXX XXXX XXXX XXXX</span></td>
  95       <td class="bits"><span class="used" title="Type of hedge on NE border">XXX</span> <span class="used" title="Field production stage">XXXXX</span></td>
  96     </tr>
  97     <tr>
  98       <td rowspan=3>1</td>
  99       <td class="caption">rail</td>
 100       <td class="bits" rowspan=3><span class="used" title="Ship docking tile status (for half-tile with water)">X</span><span class="free">OO</span><span class="used" title="Owner">X XXXX</span></td>
 101       <td class="bits"><span class="free">OOOO</span> <span class="used" title="Reserved tracks">XXXX</span> <span class="free">OOOO OOOO</span></td>
 102       <td class="bits"><span class="free">OOOO OOOO</span> </td>
 103       <td class="bits"><span class="free">OOOO</span> <span class="used" title="Ground type: fences, snow, desert">XXXX</span></td>
 104       <td class="bits"><span class="used" title="Rail tile type: rail, rail with signals, depot">OO</span> <span class="used" title="Track pieces">XXXXXX</span></td>
 105       <td class="bits" rowspan=3><span class="free">OOOO OOOO</span></td>
 106       <td class="bits" rowspan=3><span class="free">OOOO OOOO</span></td>
 107       <td class="bits" rowspan=3><span class="free">OOOO OOOO OO</span><span class="used" title="Railway type">XX XXXX</span></td>
 108     </tr>
 109     <tr>
 110       <td class="caption">rail with signals</td>
 111       <td class="bits"><span class="free">OOOO</span> <span class="used" title="Reserved tracks">XXXX</span> <span class="used" title="Signal types and sempahore/lights">XXXX XXXX</span></td>
 112       <td class="bits"><span class="used" title="Signals present">XXXX</span> <span class="free">OOOO</span></td>
 113       <td class="bits"><span class="used" title="Signals colors">XXXX</span> <span class="used" title="Ground type: fences, snow, desert">XXXX</span></td>
 114       <td class="bits"><span class="used" title="Rail tile type: rail, rail with signals, depot">O1</span> <span class="used" title="Track pieces">XXXXXX</span></td>
 115     </tr>
 116     <tr>
 117       <td class="caption">depot</td>
 118       <td class="bits"><span class="pool" title="Depot index on pool">XXXX XXXX XXXX XXXX</span></td>
 119       <td class="bits"><span class="free">OOOO</span> <span class="free">OOOO</span></td>
 120       <td class="bits"><span class="free">OOOO</span> <span class="used" title="Ground type: fences, snow, desert (fences on depot are not valid)">XXXX</span></td>
 121       <td class="bits"><span class="used" title="Rail tile type: rail, rail with signals, depot">11</span><span class="free">O</span><span class="used" title="PBS reservation">X</span> <span class="free">OO</span><span class="used" title="Depot exit direction">XX</span></td>
 122     </tr>
 123     <tr>
 124       <td rowspan=3>2</td>
 125       <td class="caption">road</td>
 126       <td class="bits"><span class="free">OOO</span><span class="used" title="Owner of road">X XXXX</span></td>
 127       <td class="bits" rowspan=2><span class="pool" title="Town index on pool">XXXX XXXX XXXX XXXX</span></td>
 128       <td class="bits"><span class="used" title="Owner of tram">XXXX</span> <span class="used" title="Tram pieces">XXXX</span></td>
 129       <td class="bits" rowspan=3><span class="free">OO</span><span class="used" title="Road type">XX XXXX</span></td>
 130       <td class="bits"><span class="used" title="Tile type: simple road (00), level crossing (01), road depot (10)">OO</span> <span class="used" title="Disallow vehicles to go a specific direction">XX</span> <span class="used" title="Road pieces">XXXX</span></td>
 131       <td class="bits"><span class="free">OO</span> <span class="used" title="Pavement type">XXX</span><span class="free">OOO</span></td>
 132       <td class="bits"><span class="free">OO</span><span class="used" title="Snow/desert present">X</span> <span class="free">O</span><span class="used" title="Roadworks counter">XXXX</span></td>
 133       <td class="bits" rowspan=1><span class="free">OOOO</span> <span class="used" title="Tram type">XXXX XX<span class="free">OO OOOO</span></td>
 134     </tr>
 135     <tr>
 136       <td class="caption">level crossing</td>
 137       <td class="bits"><span class="free">OOO</span><span class="used" title="Owner of rail track">X XXXX</span></td>
 138       <td class="bits"><span class="used" title="Owner of tram">XXXX</span> <span class="free">OOOO</span></td>
 139       <td class="bits"><span class="used" title="Tile type: simple road (00), level crossing (01), road depot (10)">O1</span> <span class="used" title="Lights are on">X</span> <span class="used" title="PBS reservation">X</span><span class="free">OOO</span><span class="used" title="Direction of the rail and roads">X</span></td>
 140       <td class="bits"><span class="free">OO</span> <span class="used" title="Pavement type">XXX</span><span class="free">OOO</span></td>
 141       <td class="bits"><span class="free">OO</span><span class="used" title="Snow/desert present">X</span> <span class="used" title="Owner of road">XXXXX</span></td>
 142       <td class="bits" rowspan=1><span class="free">OOOO</span> <span class="used" title="Tram type">XXXX XX</span> <span class="used" title="Railway type">XXXXXX</span></td>
 143     </tr>
 144     <tr>
 145       <td class="caption">road depot</td>
 146       <td class="bits"><span class="free">OOO</span><span class="used" title="Owner of the depot">X XXXX</span></td>
 147       <td class="bits"><span class="pool" title="Depot index on pool">XXXX XXXX XXXX XXXX</span></td>
 148       <td class="bits"><span class="usable" title="Owner of tram depot">XXXX</span> <span class="free">OOOO</span></td>
 149       <td class="bits"><span class="used" title="Tile type: simple road (00), level crossing (01), road depot (10)">1O</span><span class="free">OO OO</span><span class="used" title="Depot exit direction">XX</span></td>
 150       <td class="bits"><span class="free">OOOO OOOO</span></td>
 151       <td class="bits"><span class="free">OO</span><span class="used" title="Snow/desert present">X</span> <span class="usable" title="Owner of road depot">XXXXX</span></td>
 152       <td class="bits" rowspan=1><span class="free">OOOO</span> <span class="used" title="Tram type">XXXX XX</span><span class="free">OO OOOO</span></td>
 153     </tr>
 154     <tr>
 155       <td rowspan=2>3</td>
 156       <td class="caption">finished house</td>
 157       <td class="bits" rowspan=2><span class="used" title="House random bits">XXXX XXXX</span></td>
 158       <td class="bits" rowspan=2><span class="pool" title="Town index on pool">XXXX XXXX XXXX XXXX</span></td>
 159       <td class="bits"><span class="used" title="House is complete/in construction (see m5)">1</span> <span class="used" title="House type (m4 + m3[6])">X</span><span class="free">O</span><span class="usable" title="Activated triggers (bits 2..4 don't have a meaning)">XXX</span><span class="used" title="Activated triggers (bits 2..4 don't have a meaning)">XX</span></td>
 160       <td class="bits" rowspan=2><span class="used" title="House type (m4 + m3[6])">XXXX XXXX</span></td>
 161       <td class="bits"><span class="used" title="Age in years, clamped at 255">XXXX XXXX</span></td>
 162       <td class="bits" rowspan=2><span class="abuse" title="Newhouses activated: periodic processing time remaining; if not, lift position for houses 04 and 05">XXXX XX</span><span class="free">OO</span></td>
 163       <td class="bits" rowspan=2><span class="abuse" title="If newhouses active, m7 is the current animation frame">XXXX</span> <span class="abuse" title="If newhouses active, m7 is the current animantion frame; if not, lift behaviour for houses 04 and 05">XXXX</span></td>
 164       <td class="bits" rowspan=2><span class="free">OOOO OOOO OOOO OOOO</span></td>
 165     </tr>
 166     <tr>
 167       <td class="caption">house under construction</td>
 168       <td class="bits"><span class="used" title="House is complete/in construction (see m5)">O</span> <span class="used" title="House type (m4 + m3[6])">X</span><span class="free">O</span><span class="usable" title="Activated triggers (bits 2..4 don't have a meaning)">XXX</span><span class="used" title="Activated triggers (bits 2..4 don't have a meaning)">XX</span></td>
 169       <td class="bits"><span class="free">OOO</span><span class="used" title="Construction stage">XX</span> <span class="used" title="Construction counter">XXX</span></td>
 170     </tr>
 171     <tr>
 172       <td>4</td>
 173       <td class="caption">trees</td>
 174       <td class="bits"><span class="free">O</span><span class="used" title="Water class">XX</span><span class="usable" title="Owner (always OWNER_NONE)">1 OOOO</span></td>
 175       <td class="bits"><span class="free">OOOO OOO</span><span class="used" title="Tree ground">XXX</span> <span class="used" title="Tree density">XX</span> <span class="used" title="Tree counter">XXXX</span></td>
 176       <td class="bits"><span class="usable" title="Tree type unused bits">XX</span><span class="used" title="Tree type">XX XXXX</span></td>
 177       <td class="bits"><span class="free">OOOO OOOO</span></td>
 178       <td class="bits"><span class="used" title="Number of trees on tile (+1)">XX</span><span class="free">OO O</span><span class="used" title="Tree growth">XXX</span></td>
 179       <td class="bits"><span class="free">OOOO OOOO</span></td>
 180       <td class="bits"><span class="free">OOOO OOOO</span></td>
 181       <td class="bits"><span class="free">OOOO OOOO OOOO OOOO</span></td>
 182     </tr>
 183     <tr>
 184       <td rowspan=8>5</td>
 185       <td class="caption">rail station</td>
 186       <td class="bits" rowspan=8><span class="free">O</span><span class="used" title="Water class">XX</span> <span class="used" title="Owner">XXXXX</span></td>
 187       <td class="bits" rowspan=8><span class="pool" title="Station index on pool">XXXX XXXX XXXX XXXX</span></td>
 188       <td class="bits" rowspan=2><span class="used" title="Random bits">XXXX</span> <span class="free">OOOO</span></td>
 189       <td class="bits" rowspan=2><span class="used" title="Custom station specifications ID">XXXX XXXX</span></td>
 190       <td class="bits"><span class="used" title="Graphics index">XXXX XXXX</span></td>
 191       <td class="bits" rowspan=2><span class="used" title="May have pylons">X</span><span class="used" title="Station type">XXXX</span> <span class="used" title="Reserved track">X</span><span class="used" title="May have wires">X</span><span class="used" title="Tile is blocked">X</span></td>
 192       <td class="bits" rowspan=2><span class="used" title="Animation frame">XXXX XXXX</span></td>
 193       <td class="bits" rowspan=2><span class="free">OOOO OOOO OO</span><span class="used" title="Railway type">XX XXXX</span></td>
 194     </tr>
 195     <tr>
 196       <td class="caption">rail waypoint</td>
 197       <td class="bits"><span class="usable" title="Graphics index">OOOO OOO</span><span class="used" title="Graphics index">X</span></td>
 198     </tr>
 199     <tr>
 200       <td class="caption">road stop</td>
 201       <td class="bits"><span class="used" title="Owner of tram">XXXX</span> <span class="free">OOOO</span></td>
 202       <td class="bits" rowspan=2><span class="free">OO</span><span class="used" title="Roadtype for road stop">XX XXXX</span></td>
 203       <td class="bits" rowspan=2><span class="usable" title="Graphics index">OOOO O</span><span class="used" title="Graphics index: 00 (exit towards NE), 01 (exit towards SE), 02 (exit towards SW), 03 (exit towards NW), 04 (drive through X), 05 (drive through Y)">XXX</span></td>
 204       <td class="bits" rowspan=6><span class="free">O</span><span class="used" title="Station type">XXX X</span><span class="free">OOO</span></td>
 205       <td class="bits" rowspan=2><span class="free">OOO</span><span class="used" title="Owner of road">X XXXX</span></td>
 206       <td class="bits"><span class="free">OOOO</span> <span class="used" title="Tram type">XXXX XX</span> <span class="used" title="Custom road stops specifications ID">XXXXXX</span></td>
 207     </tr>
 208     <tr>
 209       <td class="caption">road waypoint</td>
 210       <td class="bits"><span class="used" title="Owner of tram">XXXX</span> <span class="used" title="Pavement type">XX</span><span class="free">OO</span></td>
 211       <td class="bits"><span class="used" title="Snow/desert present">X</span><span class="free">OOO</span> <span class="used" title="Tram type">XXXX XX<span class="free">OO OOOO</span></td>
 212     </tr>
 213     <tr>
 214       <td class="caption">airport</td>
 215       <td class="bits"><span class="used" title="Random bits">XXXX</span> <span class="free">OOOO</span></td>
 216       <td class="bits"><span class="free">OOOO OOOO</span></td>
 217       <td class="bits"><span class="used" title="Graphics index">XXXX XXXX</span></td>
 218       <td class="bits"><span class="used" title="Animation frame">XXXX XXXX</span></td>
 219       <td class="bits" rowspan=4><span class="free">OOOO OOOO OOOO OOOO</span></td>
 220     </tr>
 221     <tr>
 222       <td class="caption">dock</td>
 223       <td class="bits"><span class="free">OOOO OOOO</span></td>
 224       <td class="bits"><span class="free">OOOO OOOO</span></td>
 225       <td class="bits"><span class="usable" title="Graphics index">OOOO </span><span class="usable" title="Graphics index">O</span><span class="used" title="Graphics index">XXX</span></td>
 226       <td class="bits"><span class="free">OOOO OOOO</span></td>
 227     </tr>
 228     <tr>
 229       <td class="caption">buoy</td>
 230       <td class="bits"><span class="free">OOOO OOOO</span></td>
 231       <td class="bits"><span class="free">OOOO OOOO</span></td>
 232       <td class="bits"><span class="usable">OOOO OOOO</span></td>
 233       <td class="bits"><span class="free">OOOO OOOO</span></td>
 234     </tr>
 235     <tr>
 236       <td class="caption">oilrig</td>
 237       <td class="bits"><span class="free">OOOO OOOO</span></td>
 238       <td class="bits"><span class="free">OOOO OOOO</span></td>
 239       <td class="bits"><span class="usable">OOOO OOOO</span></td>
 240       <td class="bits"><span class="free">OOOO OOOO</span></td>
 241     </tr>
 242     <tr>
 243       <td rowspan=4>6</td>
 244       <td class="caption">sea, shore</td>
 245       <td class="bits" rowspan=4><span class="used" title="Ship docking tile status">X</span> <span class="used" title="Water class">XX</span> <span class="used" title="Owner">XXXXX</span></td>
 246       <td class="bits" rowspan=3><span class="free">OOOO OOOO OOOO OOOO</span></td>
 247       <td class="bits" rowspan=4><span class="free">OOOO OOOO</span></td>
 248       <td class="bits"><span class="free">OOOO OOOO</span></td>
 249       <td class="bits"><span class="used" title="Water tile type: coast, clear, lock, depot">O<span class="usable">OO</span>O</span> <span class="free">OOO</span><span class="used" title="Sea shore flag">X</span></td>
 250       <td class="bits" rowspan=4><span class="free">OOOO OOOO</span></td>
 251       <td class="bits" rowspan=4><span class="free">OOOO OOOO</td>
 252       <td class="bits" rowspan=4><span class="free">OOOO OOOO OOOO OOOO</span></td>
 253     </tr>
 254     <tr>
 255       <td class="caption">canal, river</td>
 256       <td class="bits"><span class="used" title="Canal/river random bits">XXXX XXXX</span></td>
 257       <td class="bits"><span class="used" title="Water tile type: coast, clear, lock, depot">O<span class="usable">OO</span>O</span> <span class="free">OOOO</span></td>
 258     </tr>
 259     <tr>
 260       <td class="caption">lock</td>
 261       <td class="bits"><span class="free">OOOO OOOO</span></td>
 262       <td class="bits"><span class="used" title="Water tile type: coast, clear, lock, depot">O<span class="usable">OO</span>1</span> <span class="used" title="Lock part">XX</span> <span class="used" title="Lock orientation m5[1..0]">XX</span></td>
 263     </tr>
 264     <tr>
 265       <td class="caption">shipdepot</td>
 266       <td class="bits"><span class="pool" title="Depot index on pool">XXXX XXXX XXXX XXXX</span></td>
 267       <td class="bits"><span class="free">OOOO OOOO</span></td>
 268       <td class="bits"><span class="used" title="Water tile type: coast, clear, lock, depot">1<span class="usable">OOO</span></span> <span class="free">OO</span><span class="used" title="Depot axis">X</span> <span class="used" title="Depot part">X</span></td>
 269     </tr>
 270     <tr>
 271       <td rowspan=2>8</td>
 272       <td class="caption">finished industry</td>
 273       <td class="bits"><span class="used" title="Completed industry">1</span> <span class="used" title="Water class">XX</span><span class="free">O</span> <span class="free">OOOO</span></td>
 274       <td class="bits" rowspan=2><span class="pool" title="Industry index on pool">XXXX XXXX XXXX XXXX</span></td>
 275       <td class="bits" rowspan=2><span class="used" title="Random bits">XXXX XXXX</span></td>
 276       <td class="bits" rowspan=2><span class="used" title="Animation loop">XXXX XXXX</span></td>
 277       <td class="bits" rowspan=2><span class="used" title="Industry graphics ID (m5 + m6[2])">XXXX XXXX</span></td>
 278       <td class="bits" rowspan=2><span class="free">OO</span><span class="used" title="Random triggers (NewGRF)">XXX</span> <span class="used" title="Industry graphics ID (m5 + m6[2])">X</span><span class="free">OO</span></td>
 279       <td class="bits" rowspan=2><span class="used" title="Animation frame">XXXX XXXX</span></td>
 280       <td class="bits" rowspan=2><span class="free">OOOO OOOO OOOO OOOO</span></td>
 281     </tr>
 282     <tr>
 283       <td class="caption">industry under construction</td>
 284       <td class="bits"><span class="used" title="Completed industry">O</span> <span class="used" title="Water class">XX</span><span class="free">O</span> <span class="used" title="If under construction, construction counter and stage of construction">XXXX</span></td>
 285     </tr>
 286     <tr>
 287       <td rowspan=2>9</td>
 288       <td class="caption">tunnel entrance</td>
 289       <td class="bits" rowspan=2><span class="used" title="Ship docking tile status (for aqueducts)">X</span><span class="free">OO</span> <span class="used" title="Owner">XXXXX</span></td>
 290       <td class="bits" rowspan=2><span class="free">OOOO OOOO OOOO OOOO</span></td>
 291       <td class="bits" rowspan=2><span class="rearrange" title="Owner of tram (road only; a rearrangement can free some of these bits)">XXXX</span> <span class="free">OOOO</span></td>
 292       <td class="bits" rowspan=2><span class="free">OO</span><span class="used" title="Road type">XX XXXX</span></td>
 293       <td class="bits"><span class="used" title="Bridge or tunnel bit">O</span><span class="free">OO</span><span class="rearrange" title="PBS reservation (rail; a rearrangement can free some of these bits)">X</span> <span class="used" title="Transport type">XX</span> <span class="used" title="Direction of the tunnel/bridge">XX</span></td>
 294       <td class="bits"><span class="free">OOOO OOOO</span></td>
 295       <td class="bits" rowspan=2><span class="free">OO</span><span class="used" title="Snow/desert present">X</span><span class="rearrange" title="Owner of road (road only; a rearrangement can free some of these bits)">X XXXX</span></td>
 296       <td class="bits" rowspan=2><span class="free">OOOO</span> <span class="used" title="Tram type">XXXX XX</span><span class="rearrange" title="Railway type (rail only; a rearrangement can free some of these bits)">XX XXXX</span></td>
 297     </tr>
 298     <tr>
 299       <td>bridge ramp</td>
 300       <td class="bits"><span class="used" title="Bridge or tunnel bit">1</span><span class="free">OO</span><span class="rearrange" title="PBS reservation (rail; a rearrangement can free some of these bits)">X</span> <span class="used" title="Transport type">XX</span> <span class="used" title="Direction of the tunnel/bridge">XX</span></td>
 301       <td class="bits"><span class="free">OO</span><span class="used" title="Bridge type: wooden, steel,...">XX XX</span><span class="free">OO</span></td>
 302     </tr>
 303     <tr>
 304       <td>A</td>
 305       <td class="caption">objects</td>
 306       <td class="bits"><span class="free">O</span><span class="used" title="Water class">XX</span> <span class="used" title="Owner">XXXXX</span></td>
 307       <td class="bits"><span class="pool" title="Object index on pool (m2 + m5)">XXXX XXXX XXXX XXXX</span></td>
 308       <td class="bits"><span class="used" title="Random bits">XXXX XXXX</span></td>
 309       <td class="bits"><span class="free">OOOO OOOO</span></td>
 310       <td class="bits"><span class="pool" title="Object index on pool (m2 + m5)">XXXX XXXX</span></td>
 311       <td class="bits"><span class="free">OOOO OOOO</span></td>
 312       <td class="bits"><span class="used" title="Animation counter">XXXX XXXX</span></td>
 313       <td class="bits" rowspan=1><span class="free">OOOO OOOO OOOO OOOO</span></td>
 314     </tr>
 315     <tr>
 316       <td colspan=2 class="caption">bits</td>
 317       <td class="bits">7654 3210</td>
 318       <td class="bits">7654 3210</td>
 319       <td class="bits">7654 3210</td>
 320       <td class="bits">FEDC BA98 7654 3210</td>
 321       <td class="bits">7654 3210</td>
 322       <td class="bits">7654 3210</td>
 323       <td class="bits">7654 3210</td>
 324       <td class="bits">7654 3210</td>
 325       <td class="bits">7654 3210</td>
 326       <td class="bits">FEDC BA98 7654 3210</td>
 327     </tr>
 328     <tr>
 329       <th colspan=2>class</th>
 330       <th>type (8)</th>
 331       <th>height (8)</th>
 332       <th>m1 (8)</th>
 333       <th>m2 (16)</th>
 334       <th>m3 (8)</th>
 335       <th>m4 (8)</th>
 336       <th>m5 (8)</th>
 337       <th>m6 (8)</th>
 338       <th>m7 (8)</th>
 339       <th>m8 (16)</th>
 340     </tr>
 341   </tbody>
 342 </table>
 343
 344 </body>
 345 </html>