a2t.sdk archive information a2t.sdk is a Shrinkit 5.25 disk archive. A self-booting ProDOS 8 diagnostics disk from the Apple II vaults of Apple Computer, released for use with any Apple II (excluding the IIgs which it will not work with). Developed for Apple II model diagnostics and tests for the Apple II through Apple IIc+, it was released to dealers in 1988. This extensive universal diagnostic program will identify any external or internal chip, rom, device for any Apple II model from the Apple II through the IIc+. The program will also run all known diagnostic tests for these and is able to identify the Apple II model and chip, rom or device. Uploaded by Doctor Dove Enjoy all your Apple II computer models !