Re: CompUSA USB 2 & firewire combo card

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Damien Hull wrote:
> I've been having doubts about this card. The packaging says it's USB 2
> but according to lspci 3 of the 4 usb ports are usb 1.1 and one is usb 2.
>
> We ran a test using a usb drive and a program called usbview. According
> to usbview 3 of the 4 ports are usb 1.1. However, when we plugged in the
> usb 2 drive it came up as usb 2. It was listed under something called
> EHCI. The other ports were labeled OHCI and the on boar usb was UHCI.
> All ports on the combo card put the usb 2 drive under EHCI. Plugging the
> drive into the on board usb port placed it under OHCI.
>

EHCI is the standard fair for usb 2, UHCI is typical of intel or via chipsets
and OHCI is for most everything else, most notably the nforce chipsets. The
ports are actually supposed to read as they do, thee 1.1 ports and one 2.0 port.
When a device connects that can support usb 2 then the EHCI controller takes
over, whichever port it is plugged in to. Otherwise, the companion controller
(OHCI in this case) handles the connection.

Art Brown
- --
- --
There is in certain living souls
A quality of loneliness unspeakable,
So great it must be shared
As company is shared by lesser beings.
Such a loneliness is mine; so know by this
That in immensity
There is one lonelier than you.
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Received on Sat Jul 9 22:09:31 2005