Chdman May 2026

Storing raw, uncompressed disc images (like BIN/CUE, ISO, or GDI) for PlayStation, Sega Saturn, or arcade hard drives consumes terabytes of space. Enter (Compressed Hunks of Data MANager). What is CHDMAN? CHDMAN is a command-line tool bundled with MAME. It converts raw disk images into the CHD (Compressed Hunks of Data) format. This format applies lossless compression to disc sectors, often reducing file sizes by 40–60% without losing any data.

chdman createcd -i input_file.cue -o output_file.chd chdman

| Emulator | CHD Support | |----------|--------------| | MAME / MESS | ✅ Native | | RetroArch (MAME core) | ✅ | | DuckStation (PS1) | ✅ | | PCSX2 (PS2) | ✅ (since recent builds) | | Redream (Dreamcast) | ✅ | | AetherSX2 (Android PS2) | ✅ | | Flycast (Dreamcast/Naomi) | ✅ | Storing raw, uncompressed disc images (like BIN/CUE, ISO,