Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!randvax!segue!psl
From: psl@segue.segue.com (Peter Langston)
Newsgroups: comp.music
Subject: Re: Rs-232 to MIDI (second try) : -)
Message-ID: <7615@segue.segue.com>
Date: 19 May 91 05:30:33 GMT
References: <34503@mimsy.umd.edu> <1991May16.031221.22789@cbnewsh.att.com>
Reply-To: psl@segue.segue.com (Peter Langston)
Organization: Segue Software, Inc. - Santa Monica, CA. +1-213-453-2161
Lines: 20

From article <34503@mimsy.umd.edu>, by ogata@leviathan.cs.umd.edu (Jefferson Ogata):
> to 9600 baud or whatever. I think it's pretty common now that you
> can just change the divider modulus to set just about any baud rate
> you like, including 31.25 kbaud, the midi baud rate.


It's trivial to set the baud rate to an acceptable value (specifically
30.7 Kbaud, which is 1.7% slow, but works just fine) on any workstation
that uses the Zilog 8530 serial communications controller chip as its UART
(it seems that most do these days).  I wrote a paper on this very subject -
"Getting MIDI From A Sun" - while I was at Bellcore.  It should be available
from them as Technical Memorandum #TM-ARH-016282.  It also describes the
construction of a $10 homebrew hardware interface to convert RS232 to MIDI.

Peter Langston

p.s.
I dodn't know how to request copies of Tech. Memos, I would just try calling
the main number, (201) 829-2000, and ask... (I would do it now, but it's
1:22 a.m. on Sunday there now.)