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From: miller@rcf.rsmas.miami.edu
Newsgroups: comp.sys.mac.hardware
Subject: Mac+ terminal emulation speeds
Message-ID: <1991Mar22.155813.11505@rcf.rsmas.miami.edu>
Date: 22 Mar 91 20:58:13 GMT
Lines: 28

As a followup to the Mac+ accelerator thread, I posted an article regarding
the speed of terminal emulators (e.g., Versaterm Pro) and whether or not they
would run faster on an accelerated Mac+. I stated that my Mac+ running
Versaterm was much slower than a "real" terminal connected to the same line.
After further (more careful) comparisons, I see that this is not true.

I have listed a file containing 500 80-character lines from a mainframe to the
Mac+'s screen and to a couple of terminals. Herewith is the data:
TERMINAL                                       CHARACTERS/SECOND
DEC VT240                                            460
Human Designs HDS3200                                889
MAC+ with Versaterm emulating a DEC VT220            615

So, there are two surprises here. First, the Mac+/Versaterm VT220 is *faster*
than DEC's VT240 which is only about half as fast as a third party terminal.
Second, all 3 are much slower than I would have guessed....

How many characters per second should my nominal 19.2k baud connection yield???

P.S. The numbers shown above remain the same regardless of whether I am doing
the listing directly from the DEC VAX to which I am connected via a LAT server 
or whether i am doing the listing from a DEC ULTRIX machine across an ethernet.
-------------------------------------------------------------------------------
Jerry L. Miller  /\         Rosenstiel School of Marine and Atmospheric Science
#\      o   O    \/     /\  University of Miami
#/ /\/\/\/\/\/\/\/\/\  /    4600 Rickenbacker Cwsy.
/ /   o       O      \/     Miami, FL 33149  USA
Phone: (305) 361-4762      INTERNET:  miller@rcf.rsmas.miami.edu