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From: daveh@cbmvax.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: Amiga memory and serial questions
Message-ID: <2901@cbmvax.UUCP>
Date: Fri, 4-Dec-87 00:53:16 EST
Article-I.D.: cbmvax.2901
Posted: Fri Dec  4 00:53:16 1987
Date-Received: Tue, 8-Dec-87 03:04:22 EST
References: <1303@saturn.ucsc.edu>
Distribution: na
Organization: Commodore Technology, West Chester, PA
Lines: 29

in article <1303@saturn.ucsc.edu>, wolf@ssyx.ucsc.edu (Mike Wolf,4264777) says:
> Keywords: slow ram, fast ram, MIDI
> In article <4558@pyr.gatech.EDU> gt4785b@pyr.UUCP (David Carter) writes:
>>And since I didn't get any reply to my question "What bit rates are available
>>on the serial port?" can somebody at least tell me what the MIDI bit rate is?
>>I've heard 'guesses' of 32,768 and 30,500, but my communications text says
>>that 20,000 bps is a practical upper limit for RS-232.
>>
>>David Carter       (waiting for my A500!)
> 
> Hmm, last time I checked, my GraphOn 250 can zip along as high
> as 56.7 KBaud.  Even old VT100's can do 19.2 KBaud.

Yeah.  Remember, everyone, that RS-232 is a complete protocol with all kinds
of specs.  All together, taking the longest permissible cable and other worst
case things, the specification probably reads that 20,000 bps is the upper
limit on what you can use without dropping bits.  Sounds reasonable, but how
many of you are using 100ft cables?  For the 2 foot cable that goes between
your Amigas, 31.8K or whatever is probably no problem.  The RS-232 spec
doesn't place any inherent limit on how fast your RS-232 hardware can run,
only how fast physics might be likely to let it run over a long cable.  And
even at that, it might still work.  It's just that if it doesn't meet the
spec, it's not really RS-232.

> Michael Wolf
-- 
Dave Haynie     Commodore-Amiga    Usenet: {ihnp4|uunet|rutgers}!cbmvax!daveh
   "The B2000 Guy"              PLINK : D-DAVE H             BIX   : hazy
		"I can't relax, 'cause I'm a Boinger!"