Quick Answer:

Yes, Our Y-mouse 9-port keyboard adapter and our Y-mouse 9-port mouse adapters both support up to nine devices.

Further Details:

Y-mouse 9-port Keyboard Adapter:

The Y-mouse 9-port keyboard adapter will support up nine different PS/2 keyboards on a single PS/2 keyboard port on your computer.

Y-mouse 9-port Mouse Adapter:

The Y-mouse 9-port keyboard adapter will support up nine different PS/2 pointing devices on a single PS/2 mouse port on your computer.

Limitations:

Like many of our Y-mouse devices, the Y-mouse 9-port keyboard adapter and our Y-mouse 9-port mouse adapters are designed to only accept data from one attached device at a time. This means that any additionally attached devices will be ignored by the Y-mouse until the first device stops reporting. The Y-mouse microprocessor monitors all data streams and sends the active stream to the computer. Switching between devices is instantaneous.