</listitem>
</itemizedlist>
+</para>
+<para>
In the case of Linux as the host operating system, device driver
writers must keep the following Linux-specific issues in mind:
<itemizedlist>
Input/Output (PIO).</emphasis>
Almost all devices can be interfaced in PIO mode: the processor is
responsible for directly accessing the bus addresses allocated to
-the device whenever it needs
+the device whenever it needs
to read or write data. Some devices also allow DMA: the device and the
memory <quote>talk</quote> to each other directly, without needing the processor.
DMA is a feature of the bus, not of the operating system (which, of
</listitem>
</itemizedlist>
-
+</para>
</section>
<section id="comediosignals">