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From: don@cs.qmc.ac.uk (Don Beal)
Newsgroups: net.micro.atari16
Subject: Re: VT52 emulator locks up serial port
Message-ID: <190@cs.qmc.ac.uk>
Date: Thu, 28-Aug-86 09:27:05 EDT
Article-I.D.: cs.190
Posted: Thu Aug 28 09:27:05 1986
Date-Received: Sat, 30-Aug-86 21:48:16 EDT
References: <860825204410.000018D7.APEG.MA@UMass>
Reply-To: don@cs.qmc.ac.uk (Don Beal)
Organization: CS Dept, Queen Mary College, University of London, UK.
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In article <860825204410.000018D7.APEG.MA@UMass> ATARI@UMass.BITNET writes:
>When I accidently hit two keys at the same time on my 1040ST, while
>using the VT52 emulator desk accessory, the serial port sometimes locks up.

I found the Atari VT52 emulator (on my 520ST) can lock up.  In my case it
was triggered by RTS/CTS problems.  My own terminal emulator did not lock up
under the same conditions, and printed a warning that the RS232 port was
not ready to transmit data.

I guess the Atari emulator does not do an "bcostat" bios call before doing
the "bconout" call.  No way for a user to fix, but trivial for the writer
of the emulator to fix, at least to the extent of not locking up.  Unjamming
the port may be harder.  I power cycled.

Anyone care to tell me what system call or calls are necessary to reset the
RS232 port?  In my case I found that toggling the RTS/CTS option, or changing
the baud rate, with the "rsconf" xbios call was not sufficient.