resurrecting a PDP-11/10

From: pavl <>
Date: Fri Feb 28 20:01:00 2003

The on-cpu SLU was so bad it was amazing! Every revision of the
processor boards has eco's and enteries in Dec-O-Logs(they never really
made it work). Disabling it is really the kindest thing, sorry for you
GT-40 owners(not that I wouldn't like one).

That looks like an install tape, it would be interesting to know how
much memory V3 uses, I have manuals for V2 and V4, but no real
information on V3.


Fred Flintstone wrote:
> Thanks for the assistance to date!
> Actually, I have a second M7800 card installed on the PDP-11/10 machine. I
> was having so much difficulty with getting a 20mA terminal (LA36-DP - OEM of
> an LA36) to work, I just about disabled the console SLC and reconfigured the
> the M7800 to work as the console! I also have M780 spares if I need them.
> (If anyone knows anything about the dip switches on the DataSouth Printer
> board in the LA-36DP P/n 5120000-1, I would be most grateful!)
> As far as memory, there are two 16kw core systems installed on this machine.
> I also have lots of paper tapes (mostly diagnostics, but also Fortran
> compiler), and 9-track tapes. I am needing to know what I am looking for to
> get RT-11 running. What did DEC call their install tapes? eg. Is the
> "RT-11 V03B BIN MT9 1/2" tape the boot/install tape?
> Is RT-11 the easiest O/S to get installed? I want to get to a point where I
> can verify the hardware is all running.
> As far as media devices, I have 3 x RK05, 1 x TS03, 2 x RX01, 1 x TU58. I
> am trying to decide what will be moved to the PDP-11/10 from the 11/20. The
> goal is to have the PDP-11/20 up and running. Getting the PDP-11/10 is just
> a step along the way.
> Where is this VTServer people had mentioned? I don't recall this item.
> Thanks.
> --barryM
> >From: Ethan Dicks <>
> >Reply-To:
> >To:
> >Subject: Re: resurrecting a PDP-11/10
> >Date: Tue, 25 Feb 2003 08:14:12 -0800 (PST)
> >
> >--- pavl <> wrote:
> > > I would strongly recommend using TU58.exe on a host pc to emulate a
> > > serial tape drive on your second serial port (you DO have a second slu?)
> >
> >On a machine that old? Unlikely. Machines of the era before the DZ-11,
> >and especially machines that were not destined for timesharing, tended
> >to have few serial ports, - a console and probably nothing else. It was
> >a boon that a low-end Qbus machine commonly came with a DLV11J with a
> >port for the console, a port for a TU58 and two more ports for DECwriters
> >or machine-to-machine communication or whatever.
> >
> >It's easy enough to _add_ a second SLU card, (DL-11something), _if_
> >you have one lying around (which I expect he doesn't).
> >
> > > to boot RT11 off virtual tape so you can poke around and build a system
> > > from there.
> >
> >As a place to put RT-11, a virtual TU58 isn't a bad idea. Hopefully
> >wharever emulator you have can emulate both units - the TU58 is kinda
> >small, even compared with 8" floppies.
> >
> > > VTserver is really amazingly great, but you may not have enough ram and
> > > booting RT or XXDP from a slu will give you better diagnostics to assess
> > > your RK05,etc
> >
> >How much RAM does VTserver require? Older versions of RT-11 (those
> >contemporary with the 11/10) are usable at aroun 8KW, IIRC. Of course
> >the full 28KW is nice, especially if you want to run large apps like
> >ADVENT, but the CUSPS should all run with minimal RAM.
> >
> >-ethan
> _________________________________________________________________
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Received on Fri Feb 28 2003 - 20:01:00 GMT

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