These files allow you to play 3D heavy-hitters like Cruis'n USA , Killer Instinct , Gauntlet Legends , and many Sega Model 2/3 games that simply won't boot with a standard ROM file.
: Masterpieces of 2D animation on the Capcom Play System 3 (CPS3) that require CHDs to store their massive sprite data. (and series)
Midway shocked the arcade world by mounting a literal, physical IDE hard drive inside the arcade cabinet to stream massive pre-rendered 3D backgrounds and heavy metal audio.
| Problem | Solution | | :--- | :--- | | | You placed the file wrong. Ensure it is in a subfolder named after the game (e.g., roms/kinst/kinst.chd ). | | "Wrong Checksum" | Your CHD version does not match your ROM version. Redownload a matching set. | | The game runs slow | CHD games require more processing power because MAME must emulate both the CPU and the hard drive data streams. | | Disk Space Full | CHD files can fill a drive fast. Delete CHDs for games you never play. | | Missing BIOS Files | Some arcade boards require a BIOS (like neogeo.zip or kinst.zip ). Ensure those are in the roms folder too. |
In arcade emulation, stands for Compressed Hunks of Data .
Ensure your CHDs match the version of your ROMset. Using a CHD from 2010 with a 2026 MAME version will rarely work. How to Set Up CHD Games in MAME
Transform your downtime. Relive the 90s. Build your dream arcade, one file at a time. 🕶️
Light gun shooters are making a massive comeback in emulation. Area 51 is a staple, and its CHD is required to run the game's video cutscenes and textures.
Area 51 , Carnevil , Gauntlet Legends , Maximum Force . Sport: NFL Blitz , NBA Showtime .
: The CHD format has proven so efficient that it has broken free from the confines of MAME. It is quickly becoming the de facto compressed format for the entire emulation community. Emulators for systems like the Sega CD, PlayStation 1, and Dreamcast all support CHD files now because they save space, maintain file integrity, and often work seamlessly with frontend launchers.