Bill Gunshannon bill.gunshannon at hotmail.com
Sun Aug 15 10:08:10 CDT 2021

On 8/15/21 12:45 AM, Warner Losh via cctalk wrote:
> On Sat, Aug 14, 2021 at 2:36 PM Warner Losh <imp at bsdimp.com> wrote:
>> On Sat, Aug 14, 2021, 2:08 PM Douglas Taylor <dj.taylor4 at comcast.net>
>> wrote:
>>> On 8/14/2021 1:54 PM, Warner Losh wrote:
>>> On Sat, Aug 14, 2021 at 10:19 AM Douglas Taylor via cctalk <
>>> cctalk at classiccmp.org> wrote:
>>>> I ran into a YouTube video, that it is 5 years old, titled "Ultrix-11
>>>> 3.1 on an emulated PDP-11/73" and I found it very interesting.
>>>> It shows installation of Ultrix-11 under SIMH.  The fellow steps through
>>>> the installation process and appears to be quite knowable.
>>>> I wanted to replicate it but couldn't locate the *.tap file used in the
>>>> video that was an image of the bootable TK50 distribution.
>>>> Bitsavers and tuhs.org have Ultrix-11 files, but not the bootable tape
>>>> image.
>>>> Anyone know where the tape image is located?
>>> https://www.tuhs.org/Archive/Distributions/DEC/Ultrix-3.1/
>>> has ultrix-3.1-bootape.tar.gz and seems to be, at first blush, the boot
>>> tape (or its files) that you are looking for.
>>> Warner
>>> I took a look at that file and don't exactly know what to do with it.  It
>>> is not a bootable image of a tape, but rather the files that are on that
>>> tape.  Have to do some more digging.  Its a learning experience.
>> There are several prep programs that take the tape files and make a .tap
>> file.
> Distributions/DEC/Ultrix-11/Fred-Ultrix3 in the tuhs archive has complete
> instructions as well as a program to build the ultrix tapes

It took a day because I wanted to test it but I have a TK50 image that
works with SIMH.  I did an install on an 11/73 with 3M of memory and
two RD54's.  Worked fine.  It's been a while since I did any Ultrix-11
on real or simulated hardware.

Have no idea how to get this tape to anyone.  It's just shy of 4M. Not
sure if it could be emailed.  The SIMH ini file is trivially simple but
I could provide that as well.

I have nowhere I could put it up for download.  I don't do things like
Google Drive.  Maybe we need a GITHUB site or something for Ultrix stuff.


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