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<h2>
  <a name="1102249"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">6.3 	 Exception control block and the saved state</font>
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  <a name="1106175"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">When an exception is taken, the state is saved in the exception control block. The evaluation stack, <span class=Signal>Status</span> register, <span class=Signal>Iptr</span>, <span class=Signal>Wptr</span> and <span class=Signal>Tdesc</span> are automatically saved on taking the exception and restored on returning. This is done to enable any exception handler to have direct access to the state of the underlying process and is required for some software scheduler implementations.</font>
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  <a name="1102316"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">The constants in <a href="except4.htm#1102311"><font  color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Table

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