PS/2 Mouse adapter for Atari 400/800/XL/XE
If you have been wanting to explore FlashJazzCat's Graphical Operating System for the 8-bit or you have a Diamond GOS cartridge and want to use a mouse, then look no further (farther?)!
This little adapter will let you use any PS/2 mouse ALSO, if your USB mouse is PS/2 compliant, then you should be able to use it with a USB to PS/2 adapter!
(As a nice side note, this will also let you use a PS/2 mouse on an Atari ST/STe/Mega)