>> A26 file

A26 file format description

Many people share .a26 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .a26 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .a26 files.

1 filename extension(s) found in our database.

.a26 - Atari 2600 ROM Image

The A26 data files are related to MESS. A26 file is an Atari 2600 ROM Image. The Atari 2600 is the first successful video game console.

Data files
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Atari 2600 ROM Image related extensions:
Atari 5200 ROM Image
Atari 7800 ROM Image
Commodore KIM-1 Image
MSX Disk Image

Naturally, other applications may also use the .a26 file extension. Even harmful programs can create .a26 files. Be especially cautious with .a26 files coming from an unknown source!

Can't open a .a26 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .a26 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:


Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Adlib Tracker II Tiny Module

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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If you have useful information about the .a26 file format, then write to us!

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