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<a name="1204413"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">9 ROM systems</font>
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<a name="1204414"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">This chapter describes advanced topics related to designing ROM systems using the ST20 toolset. It describes the ROM bootstrap, how ROM programs make external calls, OS20 awareness, compatibility with earlier toolsets, and has particular emphasis on debugging ROM systems. It explains some of the differences between debugging a system which is downloaded to the target from a linked unit and debugging a stand-alone ROM system; it also describes how to debug multiple programs on a ROM system.</font>
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<a name="1207212"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">A ROM image can be produced as a binary file (without location information), a hexadecimal file or a Motorola S-record file. The examples used in this chapter are based on a hexadecimal file, and use the command line rather than the ST Visual Develop GUI..</font>
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<a name="1207234"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Details of the command language used by the toolset are given in <a href="part4.htm#1204411"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Part 4 Command language</i></font></a>. Details of how to build a ROM image are given in the <em>ST20 Embedded Toolset User Manual</em>, chapter <em>st20cc compile/link tool</em>.</font>
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<font size=1 face="Verdana, Arial, Helvetica, sans-serif"> © 2001, 2002, 2003 STMicroelectronics. All Rights Reserved.<br>
ADCS 7250966F</font>
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