What modchip do I have??? :(

[infidelity]

Hello all

I purchased a modified ps2 almost 2 years ago, it was one of the last original models made, so it's a v11 v12? Anyway, I was reading a post about how someguy has HDDloader running without inserting either the DVD/CD disc. Does it matter what chip you have?

Now, the reason I ask, is I forget what chip is in my machine, and I don't want to open it. All I know, is that I have to hold down the power button for about 4 seconds for the machine to shut down. And, you have to hold "O" before booting up, in order to play PSX games. And, you have to hold "Square" in order to play DVD's. And, I think there's some other button you could hold, that updates the chip?? I never understood that. But if anyone can help, it would be greatly appreciated. Thank You

Also, does Contra - Shattered Soldier work from the HDD? I've tried tunning HDDLoader 2.0 pal/cd, and the disc doesn't even get to the main menu. Thanks.