the boards have their own pci bridge. ... and all of 8 BTs appear in lspci. but only the first 4 appear in dmesg after loading bttv any ideas? please.. On Fri, 2003-12-12 at 06:25, v4l@xxxxxxx wrote: > > how many bt878 can bttv work with at once? > > only 4?? > > what if I have two Provideo PV150A-4, each one has 4 BT878, which leads > > me to 8 video inputs.. > > I have no problem with the first 4, but how can I enable the next 4? > > I believe this depends on the PCI bus structure; the bt878 chip needs to be > in a bus-master capable slot, and the number of busmasters in a PCI bus is > limitied. Most cards with 4 bt878 chips have their own pci bridge on board > to avoid these problems. > > Another limiting factor is the maximum possible throughput over the PCI bus; > you can put a lot of chips in your PC, but with them all capturing your > images will be totally distorted and unusable. > > /Ico -- Fabio Roger <fabio.roger@xxxxxxxxx>
