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<p>Gerry,</p>
<p>Boy thanks for that response!! You sure did knock some dust out
of my mind!</p>
<p>I have seen part of this before; it's modifying the Tops-10 idle
loop to notify the KLH10 micro-engine that there are no jobs that
want to run. The modification is roughly equivalent to what was
done to Tops-20. However, it should not be assumed that this is
The Thing To Do on simh or other PDP-10's.<br>
</p>
<p>As I recall, simh does <i>not</i> implement the Idler device. I
believe Bob Supnick's position was something along the lines of
don't code to hardware which never existed and that the same
effect of not loading the host could be achieved by snooping the
PC.</p>
<p>MRC didn't agree at all and made some rather interesting
arguments that KLH10 (and simh, for that matter), should be seen
as legitimate PDP-10 implementations. MRC being MRC, he
generalized the Idler to provide additional functionality which
was not normally seen on a KL, a switch register and console
lights. Parts of the monitor were changed to be able to
communicate status to Bob Armstrong's PANDA display.</p>
<p>I don't see why device address 700 would be any more or less
risky than 740. As long is nothing else is sitting on the
address, you're fine from what I can remember.<br>
</p>
<div class="moz-cite-prefix">PS: Hey, you forgot TECO...<br>
</div>
<blockquote type="cite"
cite="mid:63ce264a-db5d-07d6-7461-c5b014418c1e@mail.com">
<hr width="100%" size="2">On 11/4/21 11:44 AM, G. wrote:<br>
<br>
6. Open CLOCK1.MAC with any editor of your choice (SOS, EDIT,
etc.) and
<br>
modify it as follows:
<br>
<br>
<font size="4"><tt> Before: SOJG 6,1 ;AC1 - DON'T CAUSE
EXCESSIVE MEMORY INTERFERENCE
</tt><tt><br>
</tt><tt> After: CONO 740,1 ;AC1 - DON'T CAUSE
EXCESSIVE MEMORY INTERFERENCE
</tt></font><br>
<br>
(I have removed some white space to fit either line in 78
characters)
<br>
<br>
The address in the above CONO instruction must match the address
of the
idler in the emulator configuration. Several online tutorials
suggest 700
but for some reason 740 should be a safer choice (I forgot the
specifics,
nonetheless some post in alt.sys.pdp10 may have some explanation)
</blockquote>
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