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<p>Unfortunately, in all the monitor sources, I only see the
abbreviation 'DDP', no spelling out of what it is or what it
does. I didn't immediately find an obvious driver.<br>
</p>
<div class="moz-cite-prefix">Under the Tops-10 SMP conditional,
checking is done as to whether a particular device can be used,
depending on what physical processor it is actually connected to.
If the processor doesn't own the circuit, then the request is
queued up for the processor that does. The sole case is a DDP,
which is apparently not CPU dependent.</div>
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<p>I have no idea what that could be.<br data-mce-bogus="1">
</p>
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cite="mid:70258870.10235.1610747591134.JavaMail.zimbra@stupi.com">
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<hr width="100%" size="2">On 1/15/21 4:53 PM, Peter Lothberg
wrote:<br>
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The 2020 has a KMC11 and up to 2 DUP11, and those are the
interfaces<br>
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<div>the "MRC T20 DECnet thing supports.<br data-mce-bogus="1">
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<div><br data-mce-bogus="1">
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<div>On the list of devices/sizes you posted is a "DDP" device
and I wounder<br data-mce-bogus="1">
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<div>if you knew what that is? <br data-mce-bogus="1">
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<div><br data-mce-bogus="1">
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<div>--P<br data-mce-bogus="1">
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<hr id="zwchr" data-marker="__DIVIDER__">
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<blockquote style="border-left:2px solid
#1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From:
</b>"tommytimesharing" <a class="moz-txt-link-rfc2396E" href="mailto:tommytimesharing@gmail.com"><tommytimesharing@gmail.com></a><br>
<b>To: </b>"hecnet" <a class="moz-txt-link-rfc2396E" href="mailto:hecnet@Update.UU.SE"><hecnet@Update.UU.SE></a><br>
<b>Sent: </b>Friday, January 15, 2021 4:24:07 PM<br>
<b>Subject: </b>Re: [HECnet] Thousands of DECnet errors on
Tops-20<br>
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<p>DDP? I thought it was DUP-11.<br>
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<hr width="100%" size="2">On 1/15/21 4:21 PM, Peter
Lothberg wrote:
<div><br>
</div>
Well, MRC was receiving "suggestions" from Stu
Grossman on how to do it, but<br>
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<div>if my memory does not fail me the block size was
312, due to lack of buffer space<br>
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<div>in the already crammed single section 512KW 2020.
I'm afraid my tape and disk-pack<br>
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<div>are in Seattle. I knew it was not 576 as it had two
DUP-11's and using it for transit failed... <br>
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<div><br>
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<div>Quiz, do you knew what a DDP is?<br>
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<div>-P<br>
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