Phil Yates wrote .....

>1. Connect two keyboards and two mice to one computer and see if it all
>works as it does on ADB that is, the computer will take key action from
>either keyboard, and will react to mouse movements from both mice.

Only if plugged into the USB port in the iMac which means 2 ports for 2
keyboards are required. If daisy-chained on the keyboard ports, the message
is The USB drive "unknown drive" cannot operate because it requires more
power than available.....and they're right.

>2. Now do the same with three keyboards and three mice.

No iMac ports remain.

John.....