From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stas Sergeev Subject: Re: Com port question Date: Sun, 17 Nov 2002 21:09:35 +0300 Sender: linux-msdos-owner@vger.kernel.org Message-ID: <3DD7DB5F.4070000@yahoo.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-msdos@vger.kernel.org Hello. Ged Haywood wrote: > I do not think FIFO buffering will help a program which manipulates > the DTR line directly, as the UART is not actually sending data in > the normal way - it's just being used as a 1-bit data latch. Right, that's what I implied to actually. It works quite fast in a FIFO mode [only when the actual data transfer is concerned of course]. In all other cases it falls down with perforance [and the DTR case is the one of those].