[Info-vax] pdp11

[VAXman- at SendSpamHere.ORG]

In article <mailman.8.1289945723.20035.info-vax_rbnsn.com at rbnsn.com>, Glenn Everhart <Everhart at gce.com> writes:
>Yes, I remember running DOS on pdp11; first did that with DOS V4, which became known as DOS/BATCH in V8
>and later.
>
>Anyone still interested in running it, I have some old DECtapes (for TU56 drives, yes) that still
>have copies of DECUS 11-195 on them. That is a sub-monitor that can either greatly extend (and
>somewhat speed up) DOS-11 or also allow it to service 2 users at a time.
>
>(Seeing that you have at most 28K words of memory, it's tough to get more than two sets of
>CUSPs in memory at once. However I successfully used it with a 16K word machine with two
>users running....one driven by command files. There was also a print spooler that could run
>as a kinda/sorta third user in the mix.)
>
>If anyone can still read TU56 I would be glad to let them have the tapes in exchange
>for their letting me have a copy of the contents. The DECUS library used to have them but
>I don't know that they are still extant anywhere.
>
>DOS-11 would sort of run on DECtape, but there was a limit on its DECtape handling on the
>number of files that could be open on one DECtape at a time, which made it not very useful.
>Also what with all the swapping from disk that DOS did when PCP11/MFT11 (the DECUS 11-195 thing)
>was not loaded, watching it run was an exercise for the VERY patient...a bit like running
>VMS on a remote virtual disk over a 9600 baud link. Interesting that it can be done at all,
>but not something you do unless desperate for some reason.
>
>Glenn Everhart

I've 2 TU56 (DECtape) drives from Andy Goldstein and Tom Cafarella.  They 
aren't yet connected to anything but when they are viable, I will take on
your request.

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