John Navas <spamfilter0@navasgroup.com> hath wroth:

>Only if the implementation is badly broken. USB has supported multiple
>devices per port from the get-go.

Yep. The problem is that I kept running into old hardware where the
supplied drivers would only support one device per port. The docs
accompanying the device warned that with a USB 1.0, only one USB
device could be "used" at a time. This was on an old Acer desktop and
printer. I don't recall the model numbers. When I plugged in another
USB device into a USB hub plugged into the one port, the printer port
hung. I've seen other such warnings about USB 1.0.

However, you're correct. I thought it was something inherent in the
USB 1.0 port. Apparently it's something in the device driver.

>The primary difference between 1.0 and 1.1 was the addition of 12 Mbps
>maximum speed ("full-speed" mode). 1.0 had a maximum speed of only 1.5
>Mbps.
>
>It's unlikely the computer is only 1.0 in any event -- very few 1.0
>devices actually made it to market -- 1.1 was the earliest version with
>wide support.

I've had to deal with old Acer and HP desktops that definitely came
with USB 1.0 ports. Neither are computers are available to determine
the model numbers.

>That said, there were lots of badly broken 1.1 implementations, both
>hardware and software, which led to the unflattering moniker "Unusable
>Serial Bus" as the true meaning of USB.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558