Newsgroups: comp.sys.apple2
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!cunixf.cc.columbia.edu!vw3
From: vw3@cunixf.cc.columbia.edu (Vernon Williams)
Subject: Re: //c serial ports.
Message-ID: <1991Mar28.053127.19268@cunixf.cc.columbia.edu>
Organization: Columbia University
Date: Thu, 28 Mar 1991 05:31:27 GMT

In article <8214@crash.cts.com> edwatkeys@pro-sol.cts.com (Ed Watkeys) writes:
>In-Reply-To: message from pgc@csadfa.cs.adfa.oz.au
>
>I'm not sure about this stuff, so if anyone corrects me, trust them...
>
>There are a few issues that we're dealing with at the same time.  First of
>all, when APple first put out the IIc, there was a timing problem with the
>serial ports (they used the system clock and divided it down, to the
>correct frequency, but it wasn't totallt 'correct',, if I recall).  What it

System clock??? The Apple IIc doesn't have a System Clock (unless you buy 
one from AE) I think the proplem was in a crystal. 

			[much stuff deleted]

>typers.  The only solution (the simplest) is to write the ML routines.  You
>could get into interrupts and all that, but between you and I, Apple never
>really told us how to use serial interrupts with ProDOS (they did in the
>IIc Tech Ref, but there are a few fatal typos, and it didn't deal with
>ProDOS...)  One other possibility is to talk to MDAVIS at the site where I

You might also try the ProDOS Technical Reference Manual and/or Beneath
Apple ProDOS. I think Apple tells how to deal with interrupts, it's just that
it's in the ProDOS manual.

>am, and ask him about ModemWorks.  Tell him what you need, and what you
>don't, and the fact that you have a IIc, and he'll tell you if ModemWorks
>will do the job for you...

From what I've seen of ModemWorks...it probably will fit most users' needs.
>
>Edwin Howell Watkeys III
			[Sig deleted]


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