Date: Thu, 25 Jul 1996 17:25:08 -0500 (CDT) From: "Lars Jonas Olsson" <jonas@mcs.com> To: hasty@rah.star-gate.com (Amancio Hasty) Cc: hackers@freebsd.org Subject: Re: Read Bandwidth from PCI to Triton II? Message-ID: <m0ujYqD-0003ksC@mercury.mcs.com> In-Reply-To: <199607252213.PAA03186@rah.star-gate.com> from "Amancio Hasty" at Jul 25, 96 03:13:41 pm
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> > >From The Desk Of "Lars Jonas Olsson" : > > Has anyone managed to get higher bandwidth from any PCI board > > with a Triton or Triton II based computer? > > Oops, I forgot to answer this question. > > Yeah, with the matrox meteor and PCI to PCI to a video frame buffer > such an S3 968 I routinely get about 37MBs 8) > I would love to connect two matrox meteors cards and have them > blast the screen at full speed to see what happens. If I am not > mistaken Jim Lowe has done this... > > The matrox meteor driver has code to support this feature look for > METEOR_TEST_VIDEO and I modify "tv" to support this mode. > > My system is a P100 and a Triton I ASUS motherboard. > > Enjoy, > Amancio > In other mail you asked what a Raptor does and costs. It is mostly for capturing data from digital greyscale cameras. It is a little bit old now, it does not do DMA or bus-mastering. You have to read the data via memcpy or similar from the board. The model of the board I have costs ~$3700 with digital camera interface and 4MB VRAM. The Meteor does bus-mastering so that speed can not be compared. I'm interested in memcpy speeds from PCI cards. Jonas PS The Matrox Pulsar is a competing product with the the BitFlow Raptor. Anyone have a driver for it? The Pulsar only costs ~$2000.
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