Homebrew developer Yoti has recently updated PSPident, a handy homebrew tool that provides a handful of information about your handheld and and displays all the necessary info about your PSP's motherboard. The latest update, now on version 0.73 introduces some new features and improvements.

Developer's note:

This is a 3.xx+ kernel app to display Tachyon, Baryon and Pommel version numbers of your PSP's motherboard. It also displays the PSP model (TA-079, TA-081, etc.) and overall PSP version based on this data.

Just copy the PSPident folder to your GAME/GAME3XX folder and run it. If you want, it will also run in the 1.50 kernel.

NOTE: If your PSP is detected as a TA-085 v2/TA-088, it one of the newest Slim revisions which cannot write to the battery serial and therefore cannot be used to create a Pandora battery!

Information about the numbers printed:
Kernel version - internal version of the current kernel you are running the app on (could be either 1.50 or 3.xx if you're using OE/M33)
Tachyon - this seems to be the version of the chip which contains the CPU, ME and GPU.
Baryon - this is the version number of your PSP's Syscon (system control) chip
Pommel - the PSP's GPIO/watchdog which handles system events and shuts down in the event of a crash
Kirk - the PSP's main decryption/verification chip
Spock - secondary decryption chip, only used to decrypt data from the UMD discs

Note: these are SCE names for these devices

Changelogs:

• Version 0.73
  • On FWs >= 6.20 screenshot saving implemented via FuSa ScreenShot Plugin
  • FuSa ScreenShot Plugin (c) Andy_maN
• Version 0.72
  • Some cosmetic changes
  • Accurate model shown
  • (changed last number - region)
• Version0.71
  • Some cosmetic changes
  • Added scramble (or nand seed or id scramble)
  • Very big thx to raing3 - many of future changes done by him =)
  • Screenshots now saved into "/PICTURE/PSPident/"
  • Please note that screenshot saving on 6.xx HENs still broken