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From: moore@mit-eddie.UUCP
Newsgroups: net.micro.trs-80
Subject: Re: Model 100 Asynch I/O
Message-ID: <1661@mit-eddie.MIT.EDU>
Date: Sat, 19-Apr-86 15:46:05 EST
Article-I.D.: mit-eddi.1661
Posted: Sat Apr 19 15:46:05 1986
Date-Received: Mon, 21-Apr-86 21:33:11 EST
References: <190@atari.UUcp>
Reply-To: moore@mit-eddie.UUCP (Andrew M. Moore)
Distribution: na
Organization: MIT, EE/CS Computer Facilities, Cambridge, MA
Lines: 20
Keywords: Asynchronous Serial Communications



You can use I$=INPUT$(1,1) [where MDM: or COM: is opened as file #1] to input
characters one at a time.  You can use this in conjunction with the status of
PEEK(65414) which holds the number of bytes pending in the modem receive
buffer.  Don't know if this will solve the problem of losing characters (it
probably won't) but it does give you a bit more control over the data
coming in through the MDM: and/or COM: ports.  Just for the record, a handy
line to clear the modem input buffer (receive buffer) is

   1000  IF PEEK(65414)>0 THEN I$=INPUT$(PEEK(65414),1)

	...where MDM:/COM: is opened as file #1.  This will clear the
input buffer if there are any characters there.  If no chars pending,
it does nothing.

-drew
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