File Type Commodore 64 Disk Image; File Format: Proprietary (N/A) Usage: Open manually: Rank ★ ★ ☆ Average Description: Disk image saved from a Commodore 64 disk; Commodore 64, or C64, was a popular personal computer in the 1980s Commodore 64 Type-In Program Books in the GameBase64 Collection ... 137-147, Program: Space Arena (by Bryan Files) Page: 148-161 ... Zappers for the Commodore 64 ... Answer: Files which are given the .C64 extension are known as Commodore 64 bitmap image files, however other file types may also use this extension. If you are aware of any additional file formats that use the C64 extension, please let us know. Program 2 is a SpeedScript file conversion utility. It translates SpeedScript screen-code program files into either Commodore ASCII or true ASCII. The program works only with disk-not with tape. These translated files are stored in sequential format, the file type used in most file-processing applications. Commodore 64 binary executable. A Commodore 64 binary executable is intended to be run on a Commodore 64 or on another machine that is emulating one. These files are often stored with the extension .prg when kept in filesystems that distinguish types by extension.