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From: englandr@phoenix.Princeton.EDU (Scott Englander)
Newsgroups: comp.sys.mac,rec.music.synth
Subject: Re: DIY MIDI interface?
Keywords: MIDI, Mac, serial port
Message-ID: <5130@phoenix.Princeton.EDU>
Date: 4 Jan 89 18:46:57 GMT
References: <817@ttrdf.UUCP> <12456@dcatla.UUCP>
Reply-To: englandr@phoenix.Princeton.EDU (Scott Englander)
Organization: Princeton University, NJ
Lines: 11

In article <12456@dcatla.UUCP> dlmnm@sunc.UUCP (Michael N. Moran) writes:
>On a related topic, I'd like to know if there is a "correct" way to
>setup a serial port to use external clocking. I could muck with the
>serial chip directly but ... the implications make me shudder.

There is a line on the Mac serial port called HSKi or TRxC, which you
can use to feed in an external clock signal.  You need to use an
interface chip to convert TTL to bipolar signals, of course.
-- 

                                               - Scott