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000055_news@newsmaster….columbia.edu _Fri Jul 11 09:06:56 1997.msg
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From: k.r.hallam@bristol.ac.uk
Subject: PC ---> PDP-11 micro/RSX problems
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Dear All,
I've only just discovered that this group exists. I wonder if any of you
could help me out with this problem.
Does anyone have any knowledge about using KERMIT-11 (k11pos T3.50, 2nd.
April 1986 (long packet support - whatever that means!), under
micro/RSX
(v. 3.1, base level 24C) on a Digital PDP-11 computer? I know I can
uccessfully send text files from the PDP computer to a
PC (286/25 Windows 3.1 kermit v. 3.14, 21st. May 1995, patch level 9).
The PDP is part of an analytical instrument (VG Escascope) and I can see
that when I log into the PDP, bits of software (tasks that appear when I
use SHO TASKS) I assume are to do with the instrument get loaded up into
memory, before I run the data acquisition software itself (stuff to do
with the plotter, printer, etc.). I know I can send text files from the
PDP to the PC and they seem to look o.k. when they arrive. I know I can
send (after SET FILE TYPE BINARY) raw spectra and image files from the
PDP to the PC (but, because they are in the manufacturer's format, I
can't necessarily be sure they are still o.k.). But when I try and send
these binary files back to the PDP, I get a "memory protect violation"
error message and get kicked back out into the operating system on the
PDP. Looking at the memory (SHO MEM) while logged into session 1 (tt0:),
I see an entry for the other session (tt1:) appear when I start up
kermit on the second session, and disappear when I try and RECEIVE, and
kermit gets aborted, bt I don't really understand all that SHO MEM is
saying to me. Anyone got any ideas? Need more details?? After an
unfortunate
occasion with a hard disc failure followed by two back-up tapes getting
corrupted, I would like to use newer PC hardware as backup media, but
need to be sure I
can transfer my data back to the old PDP for processing in the future.
Thankyou,
Keith Hallam
--
---
Interface Analysis Centre, University of Bristol, Oldbury House,
121, St. Michael's Hill, Bristol, BS2 8BS, England
Telephone: +44 (0)117 925 5666 | Facsimile: +44 (0)117 925 5646
URL: http://www.phy.bris.ac.uk/research/iac/home.html