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From: dbell@cup.portal.com (David J Bell)
Newsgroups: comp.music
Subject: Re: HELP! My Mac IIfx modem port can't be un-MIDI'ed!
Message-ID: <37968@cup.portal.com>
Date: 13 Jan 91 06:43:39 GMT
References: <1991Jan12.205152.16846@portia.Stanford.EDU>
Distribution: na
Organization: The Portal System (TM)
Lines: 27

Neil:

>I have a problem with the modem port on my Mac IIfx.  After running
>the MIDI sequencer program EZVision from Opcode Systems, the port
>appears to be "damaged" for normal data-modem use.  Specifically, I
>can send ASCII to the modem (proved by the fact that it will accept
>Hayes dialing commands, etc.) but no ASCII data comes back from the
>modem (no command echoes or OK's).
>The modem itself is working, since I can use it perfectly well from
>the printer port, when I set the communications program (Quick Link
>II) to use the printer port.

>The modem port works for both input and output in MIDI mode using
>Opcode's MIDI Translator interface with my keyboard and tone
>generator.

I'm not familiar with the interface you're using, nor with the
software, but this sounds an awful lot as if something (a still-
resident MIDI driver, for instance) is trapping received data
interrupts on the COM port. Properly behaved software should not
service interrupts from a device that it is not currently using,
but this type of error is not uncommon between different programs
co-residing in the O.S...

Maybe someone with more MAC MIDI experience can tell you more.

Dave