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Date:	Wed, 6 Dec 2000 14:47:24 -0500
From:	Christopher Faylor <cgf AT redhat DOT com>
To:	"'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject:	Re: O_NONBLOCK serial I/O blocks on 95, OK on NT
Message-ID:	<20001206144724.C9721@redhat.com>
Reply-To:	cygwin AT cygwin DOT com
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References:	<F10D23B02E54D011A0AB0020AF9CEFE999EE7C AT lynx DOT ceddec DOT com>
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In-Reply-To:	<F10D23B02E54D011A0AB0020AF9CEFE999EE7C@lynx.ceddec.com>; from btown@ceddec.com on Wed, Dec 06, 2000 at 02:46:30PM -0500

On Wed, Dec 06, 2000 at 02:46:30PM -0500, Town, Brad wrote:
>Christopher Faylor [mailto:cgf AT redhat DOT com] wrote:
>> Serial I/O in cygwin uses MS overlapped I/O.  Maybe this 
>> isn't completely
>> implemented on w9x.
>
>Microsoft's overlapped I/O for serial ports is fully implemented, though
>it's just different enough to drive you crazy.  I've had times when serial
>I/O code (straight Win32 API stuff) would work perfectly under NT/2000, but
>would fail under Win9x because some parameters were considered invalid.  I
>wish I could remember the details.

FWIW, I have tested serial I/O on w9x so it probably isn't something simple.

cgf

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