.D71 File Extension

Commodore 64 1571 Disk Image

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What is a D71 file?

A D71 file contains a disk image dumped from a 1571 floppy disk for Commodore 64 (C64), a popular personal computer from the 1980s. It stores information about a Commodore 64 game or program in D71 format, consisting of 256-byte data sectors organized into multiple tracks. Various C64 emulators support D71 files, allowing users to run their stored game or program on a modern computer.

More Information

Screenshot of a .d71 file in VICE 3
D71 file open in VICE 3

The now-discontinued Commodore 64 supported various storage devices for transferring data. Supported devices include floppy disks, magnetic tape datasettes, and cartridges.

Commodore computing enthusiasts acquire actual Commodore 64 1571 floppy disks and save their data as a file in the D71 format. They can then load the D71 files in a Commodore emulator to run the game or program. Some users also upload the D71 files online to share them with other Commodore 64 enthusiasts.

More information about the D71 format

The D71 format supports data dumped from 1571 floppy disks, which may be one-sided like 1541 floppy disks (stored in the .D64 format), or double-sided. One-sided floppy disks typically store multiple 256-byte sectors in 35 tracks. Double-sided floppy disks store 70 tracks, resulting in a file doubled in size.

D71 is one of several formats utilized to store Commodore 64 games or programs that computer enthusiasts load in emulators to run the game or program. Other formats created by Commodore 64 enthusiasts include D64, .G41, .T64, and .X64.

How to open a D71 file

You can open D71 files with various emulators, including Vice (multiplatform), WinVICE (Windows), and CCS64 (Windows).

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Programs that open D71 files


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