This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
A TrackStar is a single board Apple 2 computer that plugs into a PC Clone with at least one ISA slot or into an IBM PS/2 computer. The most advanced models, Trackstar E and Trackstar Plus, work like an enhanced 128k //e. Trackstar can run Apple II software from virtual "trackstore" disk images, virtual hard disk, and, with Apple II disk drive plugged, Apple II diskettes. (With the correct cables, it can use some Apple II diskettes in compatible PC 5.25" drives.) For more about Trackstar boards, software, and setup, see FAQs Resource file R022TRKSTAR.TXT.) --Bill Whitson, Michael Kelsey, Mike "Moose" O'Malley, Rubywand, Wayne Stewart