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From: ogata@leviathan.cs.umd.edu (Jefferson Ogata)
Newsgroups: comp.music
Subject: Re: Rs-232 to MIDI (second try) :-)
Message-ID: <34503@mimsy.umd.edu>
Date: 15 May 91 14:40:50 GMT
References: <1991May14.162730.1@dev0d.mdcbbs.com>
Sender: news@mimsy.umd.edu
Reply-To: ogata@leviathan.cs.umd.edu (Jefferson Ogata)
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 15

A few people seem to be under the impression that midi baud rate is
a major problem for RS-232 interfaces to match. I might mention that
the clock sources for serial ports in most modern machines are
programmable counter/timers that can be programmed right from the
cpu. The high frequency source is likely to be some standard clock
frequency (e.g. 16 MHz), and the counter/timer just divides it down
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.

--
Jefferson Ogata     University of Maryland      Computer Science Department
"Animals without backbones hid from each other or fell down. Clamasaurs and
 oysterettes appeared as appetizers. Then came the sponges, which sucked up
                     about ten percent of all life."