is a specialized, legacy-friendly compression format that solved a real problem for PSP users in the late 2000s: fitting large UMD games onto small memory cards. While still useful for PSP emulation and original hardware, it has largely been superseded by more modern compressed formats like CHD and ZSO in broader emulation contexts.

Iso Cso May 2026

is a specialized, legacy-friendly compression format that solved a real problem for PSP users in the late 2000s: fitting large UMD games onto small memory cards. While still useful for PSP emulation and original hardware, it has largely been superseded by more modern compressed formats like CHD and ZSO in broader emulation contexts.