The PSP Emulator for Windows thats written in java gets yet another update:

Heres whats new:

New configuration setting to improve performance in some applications: "Enable saving GE screen to Texture". This option can break some applications, this is why it is only available as an option.
With this option, the content of the GE/FB are no longer saved to the PSP memory but are kept in OpenGL textures to avoid the load/save to the memory.

http://buildbot.orphis.net/jpcsp/