From GameBrew - a wiki dedicated to Video Game Homebrew.
What does this tool?
Displays the IDPS Shows Target ID Displays Motherboard revision Save your IDPS in IDPS.bin file
When the program starts you will see the typical intro screen, if you choose “Yes” you will see the data from your PS3, if sounds three beeps indicates that it was not possible dump and show the error message, and if all went well sounds a beep and you are able to see the data
Automatically saves the IDPS in dev_hdd0/IDPS.bin, you must open it with a hex editor and look hexadecimal values, for example (IDPS false, I will not reveal my IDPS):
00 00 00 01 00 85 00 05 87 15 A4 4D 47 64 F6 AA
The IDPS in this case would be: 00 00 00 01 00 85 00 05 87 15 A4 4D 47 64 F6 AA
It has been tested on PS3 FAT, in SLIM should work perfectly too.