.CASS File Extension

Apple II Cassette Tape Program

Developer N/A
2.0  |  2 Votes
Category Data Files
Format Binary

What is a CASS file?

A CASS file is a program file used to emulate a cassette-based program created for the Apple II computer. It contains a copy of the data stored on an Apple II cassette, converted for use with Virtual ][, an Apple II emulator. CASS files allow Apple II enthusiasts to run classic, cassette-based programs on modern Macs within Virtual ][.

More Information
Screenshot of a .cass file in Virtual ][
CASS file open in Virtual ][

Apple released the Apple II computer in 1977. As Apple's first entry into the home computing market, the Apple II represented a huge shift in the company's priorities and focus, culminating in the many consumer market products that Apple produces today. Largely, the Apple II was hailed as a success, resulting in a number of follow-up releases before Apple discontinued the Apple II line in 1993.

The Apple II allowed users to load and run programs in a variety of ways, including via cassette tape. To run cassette-based software, users had to purchase a cassette deck, connect it to their Apple II, and play their cassette in the deck. Then, they had to follow a series of instructions included with the cassette.

Apple II enthusiasts have cataloged and converted a number of cassette-based programs for use with Apple II emulators, so they can relive the PC's glory days. In Virtual ][, the files that contain these converted programs use the CASS extension.

How to open a CASS file

To open a CASS file in Virtual ][, drag the file to Virtual ]['s cassette player, type LOAD at the Applesoft prompt ("]"), and press Return. When the Applesoft prompt reappears, type RUN and press Return to run the program contained within your CASS file.

Open over 400 file formats with File Viewer Plus.Free Download

Programs that open CASS files

Updated August 19, 2020

Verified by FileInfo.com

The FileInfo.com team has independently researched the Apple II Cassette Tape Program file format and Mac apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

If you would like to suggest any additions or updates to this page, please let us know.