<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Mon, May 12, 2025 at 12:21 PM Noel Chiappa <<a href="mailto:jnc@mercury.lcs.mit.edu">jnc@mercury.lcs.mit.edu</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"> <br>
I wonder if this is an early predecessor to the overlay stuff in BSD 2.9 (and<br>
later BSD's)? <br></blockquote><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><font color="#0000ff">Unlikely. The BSD overlay stuff was based on Fred Cantor work at DEC in the TIG group in Merrimack, NH that did V7m and later Ultrix11. </font></span></div><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><font color="#0000ff">Fred's code works on 11/40 as well as 11/45 class processors, where as by the time of 2.11BSD they dropped the 11/40 support.</font></span></div></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=eb9cf28f-7a83-48f7-98f7-3b45af0799fe"><font color="#ffffff" size="1">ᐧ</font></div>