Place chdman.exe into the folder containing your PSX .BIN and .CUE files.
Choose a compression level (Level 9 offers the highest compression). psx highly compressed roms fixed
If an emulator doesn't support CHD or PBP, simply decompress the file back to BIN/CUE using (for CHD) or PSX2PSP (for PBP). Place chdman
If you are using a PSP or a Vita to play PSX games, the PBP format is your best bet. This format was originally designed by Sony for their "PSOne Classics" line on the PlayStation Store. PBP files allow for multi-disc games, like Final Fantasy VII or Metal Gear Solid, to be contained within a single file. This eliminates the need to swap virtual discs manually and keeps your file directory clean. If you are using a PSP or a
The Sony PlayStation 1 was a pioneer in using CD-ROM technology for gaming, which allowed for massive storage capacity compared to the cartridges of the era. However, this transition introduced a problem: . Developers often duplicated assets across the disc to reduce seek times on slow CD drives, making raw disc images (usually in .bin or .cue formats) quite large—often up to 700MB.
Download (part of MAME tools).