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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>mca_write_pos</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="MCA Driver Programming Interface" /><link rel="up" href="ch03.html" title="Chapter 3. Public Functions Provided" /><link rel="prev" href="re04.html" title="mca_read_pos" /><link rel="next" href="re06.html" title="mca_set_adapter_name" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>mca_write_pos</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re04.html">Prev</a> </td><th width="60%" align="center">Chapter 3. Public Functions Provided</th><td width="20%" align="right"> <a accesskey="n" href="re06.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="mca_write_pos"><a id="API-mca-write-pos"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>mca_write_pos —
read POS register from card
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">mca_write_pos </b>(</code></td><td>int <var class="pdparam">slot</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">reg</var>, </td></tr><tr><td> </td><td>unsigned char <var class="pdparam">byte</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2565735"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>slot</code></em></span></dt><dd><p>
slot number to read from
</p></dd><dt><span class="term"><em class="parameter"><code>reg</code></em></span></dt><dd><p>
register to read from
</p></dd><dt><span class="term"><em class="parameter"><code>byte</code></em></span></dt><dd><p>
byte to write to the POS registers
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2565796"></a><h2>Description</h2><p>
Store a POS value directly from the hardware. You should not
normally need to use this function and should have a very good
knowledge of MCA bus before you do so. Doing this wrongly can
damage the hardware.
</p><p>
This function may not be used from interrupt context.
</p><p>
Note that this a technically a Bad Thing, as IBM tech stuff says
you should only set POS values through their utilities.
However, some devices such as the 3c523 recommend that you write
back some data to make sure the configuration is consistent.
I'd say that IBM is right, but I like my drivers to work.
</p><p>
This function can't do checks to see if multiple devices end up
with the same resources, so you might see magic smoke if someone
screws up.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re04.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch03.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re06.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>mca_read_pos</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>mca_set_adapter_name</span></td></tr></table></div></body></html>
