Date: Wed, 19 May 1999 10:50:40 +0200 (MET DST) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: tobez@plab.ku.dk (Anton Berezin) Cc: multimedia@FreeBSD.ORG, tobez@plab.ku.dk, voland@plab.ku.dk Subject: Re: Matrox Meteor PPB/RGB Rev.C troubles Message-ID: <199905190850.KAA03731@labinfo.iet.unipi.it> In-Reply-To: <86d7zx2v6i.fsf@lion.plab.ku.dk> from "Anton Berezin" at May 19, 99 12:46:42 pm
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> To my surprise and disappointment, they did not work! More precisely, > they *do* work fine on frame sizes up to 256x256 (we use > PAL/RGB24/DEV1, continuous asynchronous capture with occasional single > captures to write an image file). Beyond that resolution, and we used > to use 768x576, there is a constant flow of even/odd FIFO overflows. > > The old board, being installed to the very same machine, works, so it > is not a computer hardware problem. I contacted Matrox, and they told > me that I've got three newer ``Rev.C'' boards, and that the only thing the 7116 used to have PCI timing problems which would hang solid PPro machines. This is probably the reason of the change of the PCI bridge, and could be related to your problem (e.g. the new pci bridge might have more overhead, or need some different programming to get the same performance). What you do not say is if the new boards under windows (i.e. with a matrox-supplied driver) can do what you need; this just to be sure that the new hardware has indeed the ability to sustain the required transfer rate (there is no reason it should not except for bugs in the implementation, but bugs _are_ a possibility...) cheers luigi -----------------------------------+------------------------------------- Luigi RIZZO, luigi@iet.unipi.it . Dip. di Ing. dell'Informazione http://www.iet.unipi.it/~luigi/ . Universita` di Pisa TEL/FAX: +39-050-568.533/522 . via Diotisalvi 2, 56126 PISA (Italy) http://www.iet.unipi.it/~luigi/ngc99/ ==== First International Workshop on Networked Group Communication ==== -----------------------------------+------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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