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--></style></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div>NO, the 11/23 has an MMU and was perflectly capable of running UNIX. The 23+ had the extra address lines allowing it to address 4 MB like the 11/70.</div>
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<div>------ Original Message ------</div>
<div>From "Adam Thornton" <<a href="mailto:athornton@gmail.com">athornton@gmail.com</a>></div>
<div>To "Ron Natalie" <<a href="mailto:ron@ronnatalie.com">ron@ronnatalie.com</a>>; "The Eunuchs Hysterical Society" <<a href="mailto:tuhs@tuhs.org">tuhs@tuhs.org</a>></div>
<div>Date 12/5/2024 9:29:24 PM</div>
<div>Subject Re: [TUHS] Re: Pipes (was Re: After 50 years, what has the Impact of Unix been?)</div></div><div x-em-quote=""><br /></div>
<div id="x5fb47121c9074db"><blockquote cite="CAP2nic14C4e4qyt-1XY71EXbMVjiSAArC==Rn=4-aopNCi5vbQ@mail.gmail.com" type="cite" class="cite2">
<div dir="ltr"><div dir="ltr">/23+, no? The basic 23 doesn't have an MMU, I'm pretty sure.<br /></div><br /><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Dec 5, 2024 at 11:58 AM Ron Natalie <<a href="mailto:ron@ronnatalie.com">ron@ronnatalie.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">I remember on MiniUnix (a stripped down kernel that would run on PDP11’s <br />
without memory management, in our case 11/03, 11/20, and an older 11/40) <br />
there were no kernel pipes (and limited process concurrency).<br />
The shell used the aforementioned emulation of pipe by just running the <br />
output of one process into a temporary file subsequently loaded as stdin <br />
of the other.<br />
<br />
We kind of put all that to bed when the 11/23s came out and we could run <br />
our full up kernel on the micros.<br />
<br />
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