TRON is a firmware that provides CD and DVD support for Apple II computers. It includes a low-level device driver for ATAPI, file system translators, and an application for reading and manipulating files from discs. TRON was created because Apple II computers lacked native CD support, and existing solutions were expensive or impractical. It is designed modularly and follows relevant standards. Current functionality includes playing audio CDs, reading various disc formats, and copying files between discs and Apple II volumes, though there are some limitations. Future plans include improvements to the interface and adding support for more formats and drive types.