Return-Path: Received: (qmail 15072 invoked from network); 20 Mar 2001 13:48:55 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 20 Mar 2001 13:48:55 -0000 Received: (qmail 6907 invoked from network); 20 Mar 2001 13:48:53 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 20 Mar 2001 13:48:53 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14fMKJ-000285-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 20 Mar 2001 13:37:31 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d06lmsgate-3.uk.ibm.com ([195.212.29.3]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14fMKH-000280-00 for rsgb_lf_group@blacksheep.org; Tue, 20 Mar 2001 13:37:30 +0000 Received: from d06relay02.portsmouth.uk.ibm.com (d06relay02.portsmouth.uk.ibm.com [9.166.84.148]) by d06lmsgate-3.uk.ibm.com (1.0.0) with ESMTP id NAA27916 for ; Tue, 20 Mar 2001 13:27:41 GMT X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from usa.net (dyn9-87-105-37.italy.ibm.com [9.87.105.37]) by d06relay02.portsmouth.uk.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id NAA203146 for ; Tue, 20 Mar 2001 13:36:25 GMT Message-ID: <3AB75CBE.49F5E71E@usa.net> Date: Tue, 20 Mar 2001 14:35:58 +0100 From: "Alberto di Bene" X-Mailer: Mozilla 4.73 [en] (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Re: WOLF - am I missing something ? References: <65AECDF1F89AD411900400508BFC869F9C03E5@pdw-mail-1.dera.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: > We all have to accept that doing any sort of accurate timing operation > on a PC is futile - whether Soundacard, serial port or, even worse, by > software timing. Therefore some sort of external interface really > should be used to resynchronise Tx and Rx data samples . Hmm, perhaps not all is lost. The Pentium II class CPUs and the Athlons do have the so-called Performance Timer, an hardware timer that can be queried through Windoze APIs, with resolution around 1 usec. This however would rule out old Pentiums, 486 and the AMD K6, which do not have that counter. 73 Alberto I2PHD