CAS File

What are CAS files and how to open them

Are you having problems opening a CAS file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your CAS files.

What is a CAS file?

CAS files have multiple uses, and Atari Cassette tape image is one of them. Read more about the other uses further down the page.

Atari Cassette tape image

These CAS files contain dumps software distributed on cassette tapes for the Atari, a computer system release in 1979. The CAS files can be loaded using an Atari emulator, making it possible to use old Atari software and games on modern computers.

How to open CAS files

Important: Different programs may use files with the CAS file extension for different purposes, so unless you are sure which format your CAS file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested ten different CAS openers which you will find listed below.

Last updated: September 9, 2023

All known file formats using extension .CAS

While Atari Cassette tape image is a popular type of CAS-file, we know of 10 different uses of the .CAS file extension. Different software may use files with the same extension for different types of data.

EACA Colour Genie Virtual Tape Image

These CAS files contain the image files of cassette tapes used in the EACA Colour Genie emulator, an emulator used to run software that was specific to the Colour Genie Z80 home computer. You can use these tape images in the EACA emulator and play old Colour Genie games on your modern PC.

EnCase Case data

These CAS files contain forensic images used by investigators to analyze user files. They try to find evidence such as internet history, pictures, and documents, to resolve court cases. This file is used in digital forensic processes, acquisition, analysis, and reporting.

Fluent case

These CAS files contain the general information of the problem and settings used in Fluent, a program used to perform numerical simulations and parallel computations. This is a read/write file so you can edit it using a single command line.

Frostbite Container of Assets

These CAS files contain the game data used in Frostbite, a cross-platform game engine.

Javelin Case study

These CAS files contain the worksheets created in Javelin, a data analysis program. Javelin is different from other spreadsheets because instead of building models based on data in cells, it uses objects called variables. Variables allow for flexible manipulation of the data tables, and you can perform multidimensional analysis. By using variables, Javelin gives users a way to see the logical roots and branches of each variable

M2000 tape image

These CAS files contain images of software sold on cassette tape for the Philips P2000, the first Philips home computer from the 1980s. M2000 is a Philips P2000 emulator that turns your PC into a P2000 computer, and you can run the old software by using these CAS files in the emulator.

MSX Cassette Tape Image

These CAS files are cassette tape image files containing the data of games sold on cassette tapes. You can use the BlueMSX emulator, an emulator for the MSX computer series, to run the CAS files' programs.

Quest Adventure

These CAS files contain a game project created in Quest, a game creation software that lets you make interactive text adventure games like Zork and The Hitchhiker's Guide to the Galaxy.

Sord M5 Tape Image

We know that one CAS format is Sord M5 Tape Image. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Various apps that use files with this extension

These apps are known to open certain types of CAS files. Remember, different programs may use CAS files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about CAS file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.