[TUHS] Re: running BSD 2.11 on my PDP 11/70 emulator

To me it looks like a memory issue of some sort. Setup of the MMU etc. 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. 2. The bulk of the text dump seems to just be random initialized data dumped from Ram. Aka - Printf() format strings. Indicates that the wrong address in memory is potentially being accessed. Perhaps the pdp11 emulator configuration does not have a correct mmu for your image file. For example, you are running the 11/70 emulation and the binary image you are running is actually compiled for a pdp 11/45. 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. On Mon, Apr 7, 2025, 3:30 AM Folkert van Heusden <folkert(a)vanheusden.com> wrote: >Hi, > >For fun I'm developing a PDP 11/70 emulator. It runs on everything >from >ESP32 microcontrollers up to linux, windows, etc >https://vanheusden.com/emulation/PDP-11/kek/ >Currently it can run UNIX 7 in multi user mode. >Of course I would like it to run BSD 2.11 as well (because of the >networking support). It boots, but after outputting the memory amounts >it produces a lot of garbage. It does eventually complete booting and >then allows you to log in. >I wonder if you sees this: >https://paste.nurd.space/mqIDB_0SjoDoJoasOGkiNQ_NjpRsCufAJCnKTA7ZxUI >(text) or >https://imgpaste.nurd.space/pics/437bcf0d149a017168cbbf2def8560917a037a3935c5c3aa1fbea2f7e43b485a.png >(image), does this ring a bell to anyone? I verified with simh that >the >disk-image should work. > > >regards > >-- >www.vanheusden.com