>> A78 file

A78 file format description

Many people share .a78 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .a78 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .a78 files.

1 filename extension(s) found in our database.

.a78 - Atari 7800 ROM Image

The A78 data files are related to MESS. A78 file is an Atari 7800 ROM Image. The Atari 7800 ProSystem is a video game console released by Atari Corporation in June 1986.

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

Naturally, other applications may also use the .a78 file extension. Even harmful programs can create .a78 files. Be especially cautious with .a78 files coming from an unknown source!

Can't open a .a78 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 .a78 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:

Cubicomp PictureMaker Animation Data

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 .a78 file format, then write to us!

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