Archived from groups: microsoft.public.win98.gen_discussion (
More info?)
Well, understand that I'm no USB wiz, but I think it's all you said...
and more.
--
Gary S. Terhune
MS MVP Shell/User
http://www.grystmill.com/articles/cleanboot.htm
http://www.grystmill.com/articles/security.htm
"Bill in Co." <someone@earthlink.net> wrote in message
news:%23xuhcKMPFHA.3988@tk2msftngp13.phx.gbl...
> I just tried connecting it to the video capture card, and it appears
to have
> recognized USB2 just fine! (I checked some of the video settings).
>
> What I think is involved here is there is a driver for the video
capture
> card, which talks to the USB2 driver (from Acer, in my case), which
then
> (finally) talks to windows.
>
> IOW, it isn't just one driver that's involved here, but two.
>
> So by this logic, anytime you add any USB device, two drivers will be
> invoked (one for the specific hardware, and one for USB2 access
between
> windows and that specific hardware. Right?
>
> Gary S. Terhune wrote:
> > Do you have anything connected to the card yet?
> >
> > --
> > Gary S. Terhune
> > MS MVP Shell/User
> >
http://www.grystmill.com/articles/cleanboot.htm
> >
http://www.grystmill.com/articles/security.htm
> >
> > "Bill in Co." <someone@earthlink.net> wrote in message
> > news:OrcNY7KPFHA.904@tk2msftngp13.phx.gbl...
> >> Thanks for the info and links, Gary. I just checked them out, but
guess
> >> I'll have to do a little more digging to really understand it. I
mean,
> >> the fact that there are 4 root hubs and 3 "Open Host" Controllers
listed
> >> (but there is that other guy listed, with only two ports being
added, is
> >> still a bit mystifying to me, but then again, I haven't got a good
grasp
> on
> >> Hub and Controllers just yet!
> >>
> >> Gary S. Terhune wrote:
> >>> It's normal, Bill. I may be off, but I see it this way:
> >>>
> >>> The "USB controller", whatever type, is a "port", whereas the
"Hub" is a
> >>> sort of traffic management device that keeps track of all the
devices
> >>> that are connected through that hub (you can daisy-chain a fair
number
> >>> of USB devices, including adding powered or not powered hubs
farther out
> >>> the chain.) Thus, you can have several devices handled by each
> >>> Controller/Hub pair.
> >>>
> >>>
http://www.pcguide.com/ref/hdd/if/sfUSB-c.html
> >>>
http://www.pcguide.com/ref/hdd/if/sf_USB2.htm
> >>>
http://www.pcguide.com/ref/hdd/if/sfUSB-c.html
> >>>
> >>> --
> >>> Gary S. Terhune
> >>> MS MVP Shell/User
> >>>
http://www.grystmill.com/articles/cleanboot.htm
> >>>
http://www.grystmill.com/articles/security.htm
> >>>
> >>> "Bill in Co." <someone@earthlink.net> wrote in message
> >>> news:%23jc5pcKPFHA.3296@TK2MSFTNGP15.phx.gbl...
> >>>> OK, thanks for that info.
> >>>>
> >>>> I just added a two port USB2 card to my Dell (which used to only
have a
> >>>> single USB 1.1 port, I believe from the motherboard (it was not a
PCI
> >>>> card).
> >>>>
> >>>> After installing the new drivers for this TechGear USB2 card, for
some
> >>>> reason in Control Panel, Device Manager, I now find the following
mess
> >>>> listed (but no yellow exclamations):
> >>>>
> >>>> under the first Universal Serial Bus Controllers item:
> >>>> ALi PCI to USB Enhanced Host Controller
> >>>> USB 2.0 Root Hub
> >>>>
> >>>> and under a second Universal Serial Bus Controllers item:
> >>>> ALi PCI to USB Open Host Controller
> >>>> ALi PCI to USB Open Host Controller
> >>>> ALi PCI to USB Open Host Controller
> >>>> Intel 82801BA/BAM USB Universal Host Controller (that was from
> before)
> >>>> USB Root Hub
> >>>> USB Root Hub
> >>>> USB Root Hub
> >>>> USB Root Hub
> >>>>
> >>>> I was surprised to find such a mess - and 4 USB "Root Hubs"
listed,
> >>>> whatever that is all about. I just expected to find two USB
ports
> >>>> added, plain and simple.
> >>>>
> >>>> In case there were some duplicate devices there (and I assumed
there
> might
> >>>> be), I tried removing most of them above, but when it rebooted,
it put
> them
> >>>> all back in again (but I didn't try Safe Mode). Strange. Or
I've
> got a
> >>>> bit more to learn still..
> >>>>
> >>>> Jeff Richards wrote:
> >>>>> USB is a PCI device and PCI supports multiple devices using one
> interrupt.
> >>>>>
> >>>>> "Bill in Co." <someone@earthlink.net> wrote in message
> >>>>> news:eCsQ2CvOFHA.3380@TK2MSFTNGP15.phx.gbl...
> >>>>>> Seems like it might be a good idea to disable the older USB 1.1
port
> >>>>>> (when i get that board). I guess one could always do that in
Device
> >>>>>> Manager.
> >>>>>>
> >>>>>> I thought I read that USB uses one or two interrupts - so by
adding
> that
> >>>>>> USB card to what is already there (the 1.1 port), aren't you
tying up
> >>>>>> some additional interrupts? They can't use the same ones, can
they?
> I
> >>>>>> assume not since it's conceivable you could have both ports in
use (I
> >>>>>> would think).
>
>
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