Rocksolid Light - alt.sys.pdp11 - Re: Ersatz-11 and BSD Unix

Re: Ersatz-11 and BSD Unix

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Date: Tue, 7 Jun 2022 23:37:21 -0700 (PDT)
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Subject: Re: Ersatz-11 and BSD Unix
From: wfjm.andro@gmail.com (Walter F.J. Müller)
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by: Walter F.J. Müller - Wed, 8 Jun 2022 06:37 UTC

On Thursday, January 20, 2022 at 10:24:57 PM UTC+1, j...@mdfs.net wrote:
> Can somebody give me a .ini file to boot BSD2-11 Unix on Ersatz-11?
> I got BSD2-11 from https://skn.noip.me/pdp11/ as rp0.dsk
> I can boot into it with SIMH with:
> set cpu 11/70 2M nofpp
....

Disabling the FPP with `nofpp` is not a good idea.
SimH simulates the FPP, so why not use it ?
Running without FPP is only relevant for real hardware without a functioning FPP.
BSD2.11 has a build-in FPP emulation, but that was broken. I fixed that in 2007,2009, and 2017 see
https://wfjm.github.io/blogs/211bsd/2007-01-03-patch-445.html
https://wfjm.github.io/blogs/211bsd/2009-01-04-patch-446+447.html
https://wfjm.github.io/blogs/211bsd/2017-06-06-kernel-panic-here-doc-tcsh.html

If you really want to boot with `nofpp` ensure that you use a BSD2.11 with at least patch level 447.
Some tape distributions are older than that.

Re: Ersatz-11 and BSD Unix

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Subject: Re: Ersatz-11 and BSD Unix
From: jgh@mdfs.net (Jonathan Harston)
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by: Jonathan Harston - Thu, 7 Jul 2022 22:53 UTC

Subject	Author
Ersatz-11 and BSD Unix	Walter_F.J._Müller
Ersatz-11 and BSD Unix	Jonathan Harston

Science may someday discover what faith has always known.

computers / alt.sys.pdp11 / Re: Ersatz-11 and BSD Unix