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From: rnf@shumv1.uucp (Rick Fincher)
Newsgroups: comp.sys.apple
Subject: Re: Serial Port Status questions...
Message-ID: <1990Feb13.170940.26410@ncsuvx.ncsu.edu>
Date: 13 Feb 90 17:09:40 GMT
References: <269@bucsb.UUCP> <2182@ultb.isc.rit.edu>
Reply-To: rnf@shumv1.ncsu.edu (Rick Fincher)
Distribution: na
Organization: NCSU Computing Center
Lines: 20

In article <2182@ultb.isc.rit.edu> lmb7421@ultb.isc.rit.edu (Les Barstow: Phoenix) writes:
>On a similar note, could someone please send me mail on the inner
>workings of the SCC calls - specifically, I want to set up an
>interrupt-driven read from a modem....
>I'll need info on how to do the interrupts, and how to do a read
>(info on writes would be good, too...)
>The GS Technical Reference (not Apple's references) is more than a
>little vague on SCC programming, and I could use some major help.

The SCC chip is the Zilog 8530.  Call a local parts house for a manual.
Places like Arrow Electronics, Hamilton Avnet or other parts suppliers
can get them for you.  They sent me one from Seimans that has all sorts
of Ethernet and X.25 chips in it as well as the 8530.  The docs are too
long to reproduce here.  You have to follow a rigid setup procedure with
the chip to insure that it works correctly and so that you don't ZAP the 
other serial port since both ports are in the same chip. By ZAP I mean 
software-wise not electrically.

Rick Fincher
rnf@shumv1.ncsu.edu