S5L8720

This is the Application Processor used on the iPod Touch 2G.

Exploits

• ARM7 Go - Only a semi-jailbreak, because the payload must be applied to boot to an unsigned kernel once a jailbroken system is loaded. While this is an iBoot exploit and is not, per se, only in the 8720x, the only iBoots that this exploit can be found in are the 2.1.1 iPod Touch 2G ones, and they will not on an iPhone or any of the other devices because of the BORD and CHIP tags.

Boot Chain

Bootrom->LLB->iBoot->Kernel->System Software

It is definitely worthy to note that the Pwnage exploit is fixed because the images are now flashed to the NOR in their encrypted IMG3 containers, and the bootrom can properly sigcheck LLB.