The PS/2 to ADB Adapter is an ADB dongle that enables the use of a
PS/2 mouse with an ADB-equipped Macintosh, including those with a
mouse wheel.
To enable the adapter, the Control Panel "PS/2 - ADB Mouse" should be
installed in the System Folder.
(v1.1)
Compatibility
Architecture: PPC
From the original website:
"Note: The PS/2 to ADB mouse adapter works with virtually any PS/2
input device with the following exceptions: Logitech First Mouse
Wheel, Logitech optical mouse and some Kensington 4-button mice."
The PS/2 to ADB Adapter only works with PS/2 mice, not keyboards.
Although the stated system requirements are "Any Mac with ADB Port",
the Control Panel does require a PPC Macintosh.