has released a new Custom Firmware plug-in dubbed "Cross Extended," which displays detailed system information to users regarding their PSP.
As shown in the screen capture below, information covered includes the motherboard type, battery voltage, and installed plug-in modules.
Once installed, the plugin can be accessed while running a game or in the XMB. Additionally, it is possible to take a screenshot of the system information screen by pressing Note + R.
Download: Cross Extended v1.0 Custom Firmware Plug-In for PSP
Further details and installation instructions can be found in the included readme file.