DiskTape - Version 1.1 DiskTape v1.1 is a CoCo disk-to-tape transfer utility for PC-based systems. It has been devised to help cassette-based Tandy Color Computer (CoCo) and CoCo emulator users to use disk-based files found on the Internet on their system. To keep it accessible to any type of file, it takes as input a standard PC file, which it copies into a virtual cassette (.CAS) file according to the standard settings used by the CoCo.