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<a name="1204578"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">10.1.3 Limitations</font>
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<a name="1204579"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">RCUs have some limitations that users should be aware of.</font>
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<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204580"> </a>Code and data placement using the <font size=2 face=Courier><strong>place</strong></font> command is not supported.</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204581"> </a>RCU files cannot be created as ROM image files and therefore the following <strong>st20cc</strong> options are invalid when creating an RCU:</font></p>
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<dt> <a name="1204582"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><font size=2 face=Courier><strong>-filled</strong></font>, <font size=2 face=Courier><strong>-filledval</strong></font>, <font size=2 face=Courier><strong>-off</strong></font>, <font size=2 face=Courier><strong>-romimage</strong></font>.</font>
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<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204583"> </a>When using command files, the following commands are invalid and create warning messages. The commands are ignored by <strong>st20cc</strong>, and may cause later error messages or an invalid RCU:</font></p>
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<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204584"> </a><font size=2 face=Courier><strong>bootdata</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204585"> </a><font size=2 face=Courier><strong>bootiptr</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204586"> </a><font size=2 face=Courier><strong>heap</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204587"> </a><font size=2 face=Courier><strong>initstack</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204588"> </a><font size=2 face=Courier><strong>memory</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204589"> </a><font size=2 face=Courier><strong>place</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204590"> </a><font size=2 face=Courier><strong>poke</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204591"> </a><font size=2 face=Courier><strong>romimage</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204592"> </a><font size=2 face=Courier><strong>stack</strong></font>,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1206837"> </a><font size=2 face=Courier><strong>store</strong></font>.</font></p>
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