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From: roy@phri.UUCP (Roy Smith)
Newsgroups: comp.terminals,comp.emacs
Subject: Re: VT100's keeping up at high baud rates
Message-ID: <2751@phri.UUCP>
Date: Mon, 22-Jun-87 10:36:09 EDT
Article-I.D.: phri.2751
Posted: Mon Jun 22 10:36:09 1987
Date-Received: Tue, 23-Jun-87 05:41:55 EDT
References: <1119@copper.TEK.COM> <4101@teddy.UUCP> <17160@amdcad.AMD.COM>
Reply-To: roy@phri.UUCP (Roy Smith)
Organization: Public Health Research Inst. (NY, NY)
Lines: 19
Xref: mnetor comp.terminals:322 comp.emacs:1218


	The last terminal I saw which could keep up with a steady 19.2
kbaud was the good old ADM-5.  True, it didn't have all the fancy ansi
escape sequences, but I think you could simulate a reverse-scroll by
redrawing the whole screen at 19.2 faster than you could do it for real on
a VT-10[012] at 4800 if you didn't mind the CPU load.  Maybe the RISC
people have the right idea.  The ADM-5 also had the advantage that you
could usually fix it with nothing more than a print set, a 'scope, and a
stock of generic 74XX chips.

	Seriously, I don't see any reason why terminals can't have both
fancy ansi escapes and be able to handle a steady 9600.  A faster clock for
the micro, some hardware assist for scrolling, and a nice buffer should be
all you need.  Maybe somebody could just burn the ADM-5 logic into a gate
array :-).
-- 
Roy Smith, {allegra,cmcl2,philabs}!phri!roy
System Administrator, Public Health Research Institute
455 First Avenue, New York, NY 10016