Path: utzoo!attcan!utgpu!watmath!watdragon!lotus!rrwood
From: rrwood@lotus.waterloo.edu (Roy Wood)
Newsgroups: comp.sys.atari.8bit
Subject: R: devices
Message-ID: <17311@watdragon.waterloo.edu>
Date: 17 Oct 89 16:15:16 GMT
Sender: daemon@watdragon.waterloo.edu
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I've been playing around with my modem (an SX212), trying to do some elementary
communications stuff.  Basically, the program I've written does the following:

1) open up the keyboard as device #1 (through the K: handler)
2) open the modem as device #2 (through the R: handler)
3) continually executes a loop which
     i) checks to see if a key has been pressed, and if so, the keystroke is
        read from device #1, put to device #2, and printed on-screen.
     ii) tries to read an incoming character from device #2, the modem, and
         if there is an incoming character, print it.

This sounds all well and good, but I can't read from the modem without getting
an error.  This occurs even when there are incoming characters available.

My question is: What am I screwing up?  How do I poll the modem to see whether
data is available, and then how should I read it? (single character get, or
input a string?)  What other stupid things am I doing?

Any and all advice appreciated, etc., etc., etc.


--Roy Wood (rrwood@lotus.waterloo.edu)