I don't use the Atari mice these days, but if a standard USB mouse can be used, maybe a
trackball can too. I use the PeST interface along with a USB optical mouse and USB to
PS/2 adapter. It costs £20 and if you want one, I would quickly put in an order with the
maker Alison Challis. She is currently very busy making lots of Atari stuff to order
right now, and I know that she spent the other week fulfilling her PeST orders. If you
ask her nicely and maybe send a postcard too (she loves receiving them), I am sure she
will fit in another PeST for you! Website where you can
find PeST info and Aly's email address to send your order request.
Footloose and fancy free...gizz a job!