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From: macmillan%wnre.aecl.cdn%ubc.CSNET@RELAY.CS.NET.UUCP
Newsgroups: mod.computers.vax
Subject: decserver-100 and vt240/tek mode
Message-ID: <14*macmillan@wnre.aecl.cdn>
Date: Fri, 16-Jan-87 23:30:42 EST
Article-I.D.: wnre.14*macmillan
Posted: Fri Jan 16 23:30:42 1987
Date-Received: Sat, 17-Jan-87 14:35:20 EST
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1. Why does a SHOW TERM on a terminal connected to a DECserver have
   the characteristic "No DMA"? I thought the purpose of DECservers was
   to off-load character processing..

   a. Is it really DMA, but show as non-DMA?
   b. OR are our DECservers connected incorrectly?


2. Has anyone noticed the VERY SLOW response of a VT240, running in
   Tektronix emulation, over a DECserver? Compare the speed of a terminal
   connected to a VAX 750 at 4800 b/s on a DZ-11, with an identical
   terminal connected to a VAX 8650 at 19200 b/s on a DECserver.

   The DECserver-connected terminal ran about 25% of the speed. 
   ie. the DZ-11 connected terminal was 4 times as fast, when producing a
   plot in Tektronix 4010 mode.


Perhaps #2 is related to #1. 

Note: The 750 and 8650 were lightly loaded. Response on each system was
good. 

John MacMillan
Atomic Energy of Canada
Whiteshell Nuclear Research
Pinawa, Manitoba, Canada R0E 1L0

(204) 753-2311 x2539