<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">FYI - POR is to push some new tools I have been creating into OpenSIMH shortly.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style=""><font face="arial, helvetica, sans-serif">In fairness to Will, this is in the class of a "2-minute minor," not a "4-minute major." </font>I back<font face="arial, helvetica, sans-serif"> into this issue as I was working on Oscar's new PiDP-10 and moving a very old (v6 syntax) </font>UNIXC<font face="arial, helvetica, sans-serif"> program that manipulates PDP-10 backup and TOPS-20 Dumper images. PDP-10s do things in 36 bits, which does not map cleanly to the 8 data bits of a 9-track tape (you don't want to know what the 10 does unless you have to deal with it). So, I wrote some tools to better examine and flexibly manipulate TAP files [the debug code for tapes in SIMH is a bit of a mess]. Anyway, as I was testing something, I thought I had made an error in my new tap_decode(1) tool when I was looking at the </font><font face="monospace" color="#38761d">v7.tap.gz</font><font face="arial, helvetica, sans-serif"> file that Warren has in the TUHS archives (that Will supplied/created with his</font><font color="#38761d" style="" face="monospace"> mktape</font><font face="arial, helvetica, sans-serif"> scripts). When I looked more carefully, it was missing a record. It turns out SIMH will </font>silently<font face="arial, helvetica, sans-serif"> "attach" a TAP image without a proper 9-track logical end-of-tape (it should give a warning). It also turns out Will's directions never looked for the actual 9-track EOT records - so nobody ever saw this. I mentioned it to him quietly - </font>cudo's<font face="arial, helvetica, sans-serif"> </font>for<font face="arial, helvetica, sans-serif"> coming clean.</font></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">FWIW: I always recommend Will's documents for V6 and V7 (in fact, we point to them in the OpenSIMH archives at my suggestion). The truth is, I wish we had had access to a few more that are as good as Will's for some of the other OSses.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Clem</div></div><div hspace="streak-pt-mark" style="max-height:1px"><img alt="" style="width:0px;max-height:0px;overflow:hidden" src="https://mailfoogae.appspot.com/t?sender=aY2xlbWNAY2NjLmNvbQ%3D%3D&type=zerocontent&guid=e10ac659-4925-4336-b0ad-8fec2ea12684"><font color="#ffffff" size="1">ᐧ</font></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, May 23, 2024 at 2:58 PM Will Senn <<a href="mailto:will.senn@gmail.com">will.senn@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u>
<div>
<font face="Helvetica, Arial, sans-serif">All,<br>
<br>
I can't believe it's been 9 years since I wrote up my original
notes on getting Research Unix v7 running in SIMH. Crazy how time
flies. Well, this past week Clem found a bug in my scripts that
create tape images. It seem like they were missing a tape mark at
the end. Not a showstopper by any means, but we like to keep a
clean house. So, I applied his fixes and updated the scripts along
with the resultant tape image and Warren has updated them in the
archive:<br>
<br>
<a href="https://www.tuhs.org/Archive/Distributions/Research/Keith_Bostic_v7/" target="_blank">https://www.tuhs.org/Archive/Distributions/Research/Keith_Bostic_v7/</a><br>
<br>
I've also updated the note to address the fixes, to use the latest
version of Open-SIMH on Linux Mint 21.3 "Virginia" (my host of
choice these days), and to bring the transcripts up to date:<br>
<br>
<a href="https://decuser.github.io/unix/research-unix/v7/2024/05/23/research-unix-v7-3.2.html" target="_blank">https://decuser.github.io/unix/research-unix/v7/2024/05/23/research-unix-v7-3.2.html</a><br>
<br>
Later,<br>
<br>
Will<br>
<br>
<br>
</font>
</div>
</blockquote></div>