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From: mpj@sequoia.cray.com (M. P. Johnson)
Newsgroups: comp.sys.atari.st
Subject: GFA Basic timeout INP possible ?
Keywords: GFA
Message-ID: <035236.9564@timbuk.cray.com>
Date: 28 Jun 91 10:02:37 GMT
Sender: mpj@sequoia (M. P. Johnson)
Organization: Cray Research, Inc.
Lines: 19


Hi there,

Some BASICs include a timeout option for the INP(#n) function
which polls for a byte on an input port.
For example, the Sinclair QL had A=INP(#1,5) which meant "if you
get no input from the port #1 within 5 seconds, return zero and
continue". Some BASICs use SNS(#n) which returns immediately
(with 0 if no input was present) so that the program can continue.

Does anyone know if GFA Basic will allow this ? Apparently not;
so far my programs hang on the INP if there is no more input.
I'd like to unblock the situation without manual intervention!
I am hoping there is some darker way of checking for data in the
input buffer for the port.

Thanks,

Marvin.