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<p><u>CON</u>ditions <u>O</u>ut; it's a PDP-10 I/O instruction.
This is what communicates with the Idler device that you put at
address 700.</p>
<p>At a very high level, PDP-10 is split into two halfs,
instructions for 'conditioning' the device and reading its
condition (or status bits) and instructions for performing I/O.
On the 80x86 platform, IN and OUT are used, with status registers
being at different addresses then data registers.</p>
<p>Note: I have ignored DMA, block transfers and PI.<br>
</p>
<p>The Idler will actually handle data transfers, but that is
another story.<br>
</p>
<div class="moz-cite-prefix">On 3/11/20 9:53 AM, Supratim Sanyal
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:d9a628f9-2bde-9a82-8e66-75f986516976@riseup.net">
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<div class="moz-cite-prefix">On 3/11/2020 09:38, Thomas DeBellis
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:71e53cd3-3902-207a-50ae-e34d19ac7800@gmail.com">CONO
700,1</blockquote>
<p><font face="Arial">.CONO 700,1<br>
?CONO?<br>
</font><br>
</p>
<pre class="moz-signature" cols="72">--
Supratim Sanyal, W1XMT
39.19151 N, 77.23432 W
QCOCAL::SANYAL via HECnet</pre>
</blockquote>
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