> >
> > ******** BE CAREFUL !! *******
> >
> > Not all USB - PC Card adapters will work on a Wallstreet running OS-9 and
> > earlier.
> >
> > USB Port adapters support either 'EHCI and UHCI', or 'EHCI and OHCI'
> > standards:
> > To be fully compatible with the Wallstreet, your PC-Card must support 'EHCI
> > and OHCI'.
> >
> > The difference is significant.
> > A Wallstreet running OS-X should work with any EHCI card, i.e. all the
> > above cards.
> > A Wallstreet running OS-9 and earlier will work only with the 'OHCI' cards
> >
>
> How can I tell which cards I have. I have one that likes to freeze my Wally's
> once in a while.
>
> > See explanation here:
> > http://en.wikipedia.org/wiki/Host_controller_interface#Open_Host_Controller_Interface
> >
> >
> > I found suitable cards by searching Google with search phrase 'USB Port
> > Cardbus OHCI' (without the quotes)
> >
> > Following entry from Amazon would be the correct item:
> > http://www.amazon.com/Adaptec-AUA-1420-USB-Port-CardBus/dp/B000062STT
> >
> > hope this helps..
> >
> > Alan
>
> John Carmonne
> Yorba Linda USA
Too true !
I knew about the OHCI but not EHCI.
Thanks for pointing out the difference.
I must have been just lucky with the three USB 2.0 PC cards that I have bought
for my Powerbooks as they all work in both OS9 and X.
One is " Mac compatible " whereas the other two are no-name supposedly Windows
only brands.
Stewie
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