On Tue, 21 May 2002 22:47:44 -0700 (PDT) Trent Piepho <xyzzy@xxxxxxxxxxxxx> wrote: > On Wed, 22 May 2002, Kevin Liao wrote: > > everything looks fine. BTW, how should I adjust the PCI latency in BIOS? The > > higher or lower value is better? Thanks! > > What's most important is to lower the PCI latency for other devices. This way > your sound card, IDE controller, etc. can't hog the PCI for bus for as long. > Increase the latency setting for the bt848 so it can stay on the bus longer. Ok. But how do I manage 12 or 16 BT878 chips on a machine with several PCI busses (but most cards are on the same bus) using the ServerWorks South Bridge (can't find data sheet for it, and already modify a lot the linux code to make it work [resolving IRQ conflict!])? Is there a general algorithm to choose PCI latency for each PCI device? Or should I try every other value? What's the meaning of PCI latency = 0 ? This noise problem is quite critical to our application here. One way to work-around the problem is to re-use the same buffer for capturing video (hence, "noisy lines" are in fact replaced with some lines from a previous images ... only customer are happy... ). Benoit
