> >I have tried to run a webcam (ov511 based) on my old Cyrix 486 100 Mhz
> >using an Opti OHCI card.
Seems like Cyrix and PCI have ongoing problems, in all incarnations, which
seem to show up a lot with OHCI addon cards. If you use an Intel 486,
does this same problem show up? Some Cyrix-related problems have been
been known to vanish with just a CPU swap. (I know that may not be an
answer you want, or can easily test.)
> >While all applications like vidcat, camstream and xawtv are working well on
> >my pentium, only vidcat works for the 486. How can I get xawtv and camstream
> >running for my 486 ? Is it possible to patch the device driver(s) to make
> >this apps work ?
Well, if one of them works, the others should ... you only mentioned a single
failure mode, it's possible there's only one (hardware-related?) bug:
> I have done some tests with vidcat and discovered another problem:
>
> If you try to read frames from an usb webcam on a 486 based board, it will
> block after a several frames.
>
> After a few frames, the camera device driver doesn't receive any interrupts,
> so the interrupt handler of the camera device driver (f.e. ov511) isn't
> executed any more.
Which means that the OHCI controller is probably not getting interrupts
to pass on to the camera driver, or if it's getting interrupts then the Cyrix
PCI issues may be rearing their ugly heads.
- Dave
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