Return-Path: Received: (qmail 29825 invoked from network); 18 Dec 2001 13:38:20 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 18 Dec 2001 13:38:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 520 invoked from network); 18 Dec 2001 13:38:26 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 18 Dec 2001 13:38:26 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16GKOO-0001K6-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 18 Dec 2001 13:34:48 +0000 Received: from e22.nc.us.ibm.com ([32.97.136.228]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16GKOE-0001K0-00 for rsgb_lf_group@blacksheep.org; Tue, 18 Dec 2001 13:34:38 +0000 Received: from southrelay01.raleigh.ibm.com (southrelay01.raleigh.ibm.com [9.37.3.208]) by e22.nc.us.ibm.com (8.9.3/8.9.3) with ESMTP id HAA19768 for ; Tue, 18 Dec 2001 07:30:45 -0600 Received: from usa.net (ss2.bld.socks.ibm.com [9.14.4.67]) by southrelay01.raleigh.ibm.com (8.11.1m3/NCO v5.01) with ESMTP id fBIDXZA151490 for ; Tue, 18 Dec 2001 08:33:35 -0500 Message-ID: <3C1F4567.5A3FA362@usa.net> Date: Tue, 18 Dec 2001 14:32:23 +0100 From: "Alberto di Bene" X-Mailer: Mozilla 4.78 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: long haul QSO's References: <7D653C9C42F5D411A27C00508BF8803D55C669@pdw-mail-r1.dstl.gov.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Talbot Andrew wrote: > The parallel port would enable simple hardware to allow a crude D/A > converter for driving a VCXO, but isn't the LPT port difficult to drive > under Windoze programming ? Direct I/O to peripherals is a no-no (impossible to do, anyway...) in Windows NT, Windows 2000 and XP. But there are DLLs around that contain a VxD inside, that allow to do that, acting as proxies on the behalf of your code. > What coding are you going to use - ie. the code table and timings, - then I > can write something for driving my DDS board. > I didn't say I am going to write code just now... :-) I have a few sheets of paper filled with possible coding schemes, but still have to make up my mind, there are many variables in the whole picture... but will keep you informed. 73 Alberto I2PHD