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--></style></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div>The 45 also has split I/D. The 11/ 70 is designed that if you can put a kernel that is cognizant only of the lower numbers in the line, it will still work.</div><div><br /></div><div> </div>
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<div>------ Original Message ------</div>
<div>From "Kenneth Goodwin" <<a href="mailto:kennethgoodwin56@gmail.com">kennethgoodwin56@gmail.com</a>></div>
<div>To "Folkert van Heusden" <<a href="mailto:folkert@vanheusden.com">folkert@vanheusden.com</a>></div>
<div>Cc "The Eunuchs Hysterical Society" <<a href="mailto:tuhs@tuhs.org">tuhs@tuhs.org</a>></div>
<div>Date 4/7/2025 8:02:01 AM</div>
<div>Subject [TUHS] Re: running BSD 2.11 on my PDP 11/70 emulator</div></div><div x-em-quote=""><br /></div>
<div id="xba2200001c5a47d"><blockquote cite="CAMQbRb1RL-PzoooYLDNeryS28+YkL_X0xnQ2BTA_jmzenSp6TA@mail.gmail.com" type="cite" class="cite2">
<div dir="auto">To me it looks like a memory issue of some sort. Setup of the MMU etc.<div dir="auto"><br /></div><div dir="auto">1. Your user memory is less than 10% of "available memory" which should be the amount left after the kernel loads and allocates dynamic buffers. User memory should be alot closer to available number. Unless it is referring to limits of mmu per process and not total available for all user level programs.</div><div dir="auto"><br /></div><div dir="auto">2. The bulk of the text dump seems to just be random initialized data dumped from Ram.</div><div dir="auto">Aka - Printf() format strings. Indicates that the wrong address in memory is potentially being accessed. </div><div dir="auto"><br /></div><div dir="auto">Perhaps the pdp11 emulator configuration does not have a correct mmu for your image file.</div><div dir="auto"> </div><div dir="auto">For example, you are running the 11/70 emulation and the binary image you are running is actually compiled for a pdp 11/45.</div><div dir="auto"><br /></div><div dir="auto">The 11/70 has an mmu supporting split instruction and data spaces. 64k instruction, 64k data. But the kernel you are using was compiled to run on a non split I And D version of the pdp11 supporting only 64kb of combined user and data.</div></div><br /><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Mon, Apr 7, 2025, 3:30 AM Folkert van Heusden <<a href="mailto:folkert@vanheusden.com">folkert@vanheusden.com</a>> wrote:<br /></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br />
<br />
For fun I'm developing a PDP 11/70 emulator. It runs on everything from <br />
ESP32 microcontrollers up to linux, windows, etc<br />
<a href="https://vanheusden.com/emulation/PDP-11/kek/" rel="noreferrer noreferrer">https://vanheusden.com/emulation/PDP-11/kek/</a><br />
Currently it can run UNIX 7 in multi user mode.<br />
Of course I would like it to run BSD 2.11 as well (because of the <br />
networking support). It boots, but after outputting the memory amounts <br />
it produces a lot of garbage. It does eventually complete booting and <br />
then allows you to log in.<br />
I wonder if you sees this: <br />
<a href="https://paste.nurd.space/mqIDB_0SjoDoJoasOGkiNQ_NjpRsCufAJCnKTA7ZxUI" rel="noreferrer noreferrer" class="__cef_visited">https://paste.nurd.space/mqIDB_0SjoDoJoasOGkiNQ_NjpRsCufAJCnKTA7ZxUI</a> <br />
(text) or <br />
<a href="https://imgpaste.nurd.space/pics/437bcf0d149a017168cbbf2def8560917a037a3935c5c3aa1fbea2f7e43b485a.png" rel="noreferrer noreferrer">https://imgpaste.nurd.space/pics/437bcf0d149a017168cbbf2def8560917a037a3935c5c3aa1fbea2f7e43b485a.png</a> <br />
(image), does this ring a bell to anyone? I verified with simh that the <br />
disk-image should work.<br />
<br />
<br />
regards<br />
<br />
-- <br />
<a href="http://www.vanheusden.com" rel="noreferrer noreferrer">www.vanheusden.com</a><br />
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