Article View: comp.terminals
Article #1698Re: VT100's keeping up at high baud rates
From: Roy Smith
Date: Mon, 22 Jun 1987 14:36
Date: Mon, 22 Jun 1987 14:36
19 lines
1558 bytes
1558 bytes
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
Technical Details
Message-ID:
<2751@phri.UUCP>Path:
arc1-ca.pugleaf.net!utzoo!mnetor!seismo!husc6!cmcl2!phri!royReferences:
<1119@copper.TEK.COM> <4101@teddy.UUCP> <17160@amdcad.AMD.COM>Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!husc6!cmcl2!phri!roy 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