<br>
  The purpose of this field is unknown, and is not used in the ROM fonts.
  </td>
</tr>
<tr>
  <td valign="top">
  <tt>fRectWidth</tt>
  </td>
  <td>
  Defined as "width of font rectangle". <br>
  If not set it is automatically set to the width of the widest character.
  </td>
</tr>
<tr>
  <td valign="top">
  <tt>fRectHeight</tt>
  </td>
  <td>
  Defined as "height of font rectangle". <br>
  If not set it is automatically set when the first glyph is defined. <br>
  All characters must be exactly this h