Re: [Linux-decnet-user] What DEC machines actually ran DECnet?

[Henry W. M. <hen...@at...>]

----- Original Message -----
From: "Paul Koning" <pk...@eq...>
To: <dr...@wo...>
Cc: <lin...@li...>
Sent: Friday, June 21, 2002 11:12
Subject: Re: [Linux-decnet-user] What DEC machines actually ran DECnet?


> >>>>> "Gregg" == Gregg C Levine <dr...@wo...> writes:
>
>  Gregg> Hello from Gregg C Levine writing for Jedi Knight Computers I
>  Gregg> suppose I should have asked this question before,
>  Gregg> but..... What DEC machines actually ran DECnet?
>
> 1. The PDP11, under RSX-11M, RSX-11S, RSX11-M+, P/OS, RSTS/E, RT11, or
>    IAS.  Not DOS, MUMPS, RSX-11D, Ultrix, or Micropower/Pascal as far
>    as I know.

    Are you speaking about DEC's DOS as opposed to MS-DOS/PC-DOS?
DEC did introduce a DECnet-DOS in the late 1980's, which ran on a pre
Windows PC under DOS with certain Ethernet cards or with a packet driver
shim routine.  All things considered, it ran pretty well.

> 2. VAX, under VMS, Ultrix, Digital Unix, or ELN.
> 3. DECsystem/20 (TOPS-20).
> 4. DECsystem/10 (TOPS-10)

    Both TOPS-10 and TOPS-20 utilized a PDP-11 front-end, connected
to the KL-10 via a high speed connection called the DTE.  The interface
was referred to as the DTE-11 for the PDP-11 portion, and the DTE-10
or DTE-20 for the connection to the KL-10, depending on whether it was
a DECsystem-10 or DECSYSTEM-20.

    The PDP-11 was usually a PDP-11/34 or a PDP-11/40.  The KL could
support up to three alternate front-ends; DTE0 being reserved for the
connection
to the main front-end, a PDP-11/40 running a modified version of RSX,
called
RSX-11/F.

    Each of the other three front-ends could also contain a number of
terminal
lines (usually DZ-11's or DH-11's), line printers (LP-11), card reader
and
card punch, as well as, obviously, synch line interfaces to other such
front-ends.

    In addition, the front-end's on the DECsystem-10 could also run
ANF-10,
(Advanced Networking Protocol) which was developed as a stopgap until
DECnet-10 became available, and was a powerful networking protocol in
it's
own right.

    The backend code for DECnet was built inside the TOPS-10 and TOPS-20
operating systems, and allowed the network to be used as almost any
other
device on the system or network.

> 5. Alpha, under VMS or Unix.
> 6. Various embedded systems typically based on the above, such as the
>    LPS40 printer (VAX/ELN based), an early terminal server (RSX-11S
>    based), etc.
>
> There are codepoints for PDP8 implementations but I don't think they
> actually existed.
>

    IIRC, DECnet-8 did exist, but it did not leave very much room in the
system to do much else!

> paul
>
>
>
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    Best,

-HWM