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<a name="1204800"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">10.3 Initializing the interrupt handling support system</font>
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<a name="1204801"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Before writing any interrupt handling routines, configure and initialize the interrupt hardware so that OS20 knows which hardware model is being targeted.</font>
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<a name="1204805"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Both the interrupt controller and interrupt level controller have a number of configuration registers which must be correctly programmed before peripherals can assert interrupt signals. This varies for each device and typically includes setting the <span class=Signal>Mask</span><font face="Verdana, Arial, Helvetica, sans-serif"><b> </b></font>register to enable/disable individual interrupts (see <a href="int7.htm#1204929"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Section⌨️ 快捷键说明
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