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<p class="MsoNormal">See below …</p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="border:none;padding:0cm"><b>Van: </b><a href="mailto:kjhall55@gmail.com">Ken Hall</a><br>
<b>Verzonden: </b>woensdag 12 februari 2020 18:30<br>
<b>Aan: </b><a href="mailto:simh@trailing-edge.com">simh@trailing-edge.com</a><br>
<b>Onderwerp: </b>[Simh] Initializing disks (triggered by the "Something Strange with RK05" chain</p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I’ve played with RT11 on and off over the years, but the one thing I’ve never been able to do is properly initialize an empty disk. If I create a DL2: for example, and try to run initialize on it, I get back:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">.dir dl2:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">?DIR-F-Error reading directory<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">.init dl2:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">DL2:/Initialize; Are you sure? YES<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">?DUP-F-Size function failed<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This seems similar to the issues Henk Gooijen has been having with RK05’s, and it’s been so long since I’ve dealt with the real hardware I don’t recall exactly how this is supposed to work, but it seems to me it should
just “work”.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Has anyone found a solution to this?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I can check that tomorrow. Maybe that is the reason you can download<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">an empty but initialized RL02 image (zipped) from DBIT.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If RT11 cannot figure out the size (5 MB or 10 MB / RL01 or RL02), maybe<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">the command (in SIMH) .SET RL0 RL02 helps. You specify that RL0 is an<br>
RL02. Likewise, you can say .SET RL0 RL01. On a real PDP-11 with RL drives<br>
the system will recognize what type RL01 or RL02 is connected/loaded.<br>
You can have a mix of RL01 and RL02 drives on one RL11 controller.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The .SET RLx RL01 (or RL02) command is not of RT11, but of SIMH. Give it a try
</span><span lang="EN-US" style="font-family:"Segoe UI Emoji",sans-serif">😊</span><span lang="EN-US">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">For the write protect command for the RK drives, this is probably also a<br>
SIMH command. .SET RK0 WRITEENABLE *<b>is</b>* in SIMH (as is .SET RK0 LOCKED).<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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