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<title>9.3.1 Calling to another program  </title>

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<h3>
  <a name="1204548"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">9.3.1 	 Calling to another program</font>
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<p>
  <a name="1204549"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">An example of calling from one program to another is provided in the <font size=2 face=Courier><strong>examples/dualboot</strong></font> directory. This example may be built for both ST20C2 and ST20C1 cores. The <font size=2 face=Courier><strong>examples/dualbootpre_1_8_1</strong></font> directory contains the example in a form which may be built with earlier toolsets. This example may be built for ST20C2 cores only. The examples illustrate the closing down of OS20 which must be done before calling another program.</font>
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<p>
  <a name="1204550"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">Some key points that are relevant for an ST20C2 core are illustrated and discussed below to emphasize their importance.</font>
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<p>
  <a name="1204551"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">The following code assumes the operating system has been terminated at this point.</font>
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<p>
  <a name="1204554"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">(For an example of closing the operating system, see <a href="libsrom.htm#1205260"><font  color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Chapter

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