I'm going to say that the SDK version is at least 3.1.x for two reasons. 1. I had a reference tool that had the image for the 3.1 SDK before I messed up attempting to dump it to a file. 2. I have a couple of games released in 2008 that include libraries from the 3.1 SDK. I suppose one way to find out is to get a hold of the most recent releases PS2 game and look at the files. If the game has online gameplay there is a file called IOPRPnnn.IMG file usually in a the LIB folder. NNN stands for the version number which I have best figured is the as the SDK version used. I have found games with IOPRP310.IMG. I have not found any games with anything higher that this version.
This is how you see the SDK version on a file in a game (any IRX file will do): Basically open it on a hexa editor and look for a text tag near to the end of the file with the above identification string. That file in particular is the libsd.irx for sdk 3.0.2... :thumbsup: Edit: Oh and before I forget you will find these tags on statically linked IRX files within the game mail ELF as well.
