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Date: 3 Sep 88 00:04:00 GMT
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Date: 2 September 88, 18:47:12 EST
From: Steve King                                     HEINEKEN at MTUS5
To:   INFO-APPLE at BRL.MIL

I need some help writing a modem driver.  I've searched through the scant
Apple documentation on the Super Serial Card, but it wasn't much help.
I also live hundreds of miles from anywhere (I'm in Houghton, MI), so there's
no local help for me to turn to...

What I mainly need help with is initializing the SSC for I/O.  The big
questions are: what do I need to do and how do I go about doing it?  I've got
a feeling that once the card is properly initialized I/O shouldn't be too
much of a problem.  Correct me if I'm wrong!

I'm running an enhanced Apple //e, SSC clone (which purports to be 100%
compatible.  I believe it; I haven't had any problems with Zlink, TIC, ATP,
ASCII Express, or any other terminal software I've ever used), and
Prometheus 2400 modem.  For input I plan on writing an interrupt-driven
circular buffer.  For output, I'm planning on writing a routine to use
in place of COUT1.  The routine will go something like:

BASIC or assembly language call to COUT.
    COUT calls my output routine.
        My routine:
        Point CSW to slot 3 (80 column screen).
        Call COUT1 to print character.
        Point CSW to slot 2 (SSC).
        Call COUT1 again to send character through modem.
        Return.

This should let me use normal PRINT statements from BASIC, if I so desire.

Any help in doing the initialization would be extremely helpful!
for
Oh, BTW, a while back someone offered to send me a BASIC program which does
the initialization correctly.  Please send it, if the offer's still open!

Thanks!

                                                --Steve King
                                                  HEINEKEN @ MTUS5.bitnet