Newsgroups: comp.protocols.tcp-ip
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: TCP/IP on MIDI?
Message-ID: <1989May9.184646.2106@utzoo.uucp>
Organization: U of Toronto Zoology
References: <1989May3.180345.6936@utzoo.uucp> <4076@ficc.uu.net> <1989May6.213417.20756@utzoo.uucp> <4106@ficc.uu.net>
Date: Tue, 9 May 89 18:46:46 GMT

In article <4106@ficc.uu.net> peter@ficc.uu.net (Peter da Silva) writes:
>> As for RS232, a fully-RS232C-conforming driver cannot in fact run much
>> faster than 20 kbps ... reliably...
>
>OK, RS-232 style EIA. Something-that-looks-like-RS232 that puts data on pins
>2 and 3 of a DB-25. Let's not get too picky about details.

RS423 isn't bad, and is good for higher speeds, but still not blazing.  To
get really high speeds you have to abandon RS232 compatibility completely.
(Even RS423 causes trouble at times, because it is compatible with things
that strictly conform to RS232 but is not compatible with every weird
aberration that sort of worked with RS232.)

>> With short cables and a favorable
>> phase of the moon they'll sometimes run at 38400, but that's about it.
>
>The 262000-baud maximum on the Amiga serial port must be an illusion, then.

No, it's the result of not conforming to the standards, pure and simple.
What is gained is speed; what is lost is reliability and interoperability.
-- 
Mars in 1980s:  USSR, 2 tries, |     Henry Spencer at U of Toronto Zoology
2 failures; USA, 0 tries.      | uunet!attcan!utzoo!henry henry@zoo.toronto.edu