New raw idea for a possible exploit. (and its not HTML this time :P)

[Tesseract]

PSP Homebrew is EBOOT. PSX is not. You can make a PSX ISO and convert it to an EBOOT that will run on the PSP, though.

[SpooForBrains]

It doesn't interface via those little gold terminals. As I understand it those provide power to the device. Quite why Sony didn't just provide power via USB is anyone's guess.

(I got this information from a discussion about how to hack together a non-official microphone for the PSP so it's entirely possible that it's wrong ...)

[White_Hawk_UK]

Tesseract - are you suggesting kernel-mode access via PSX code running within the PSP's PSX emulator?

Spoo - I think that's most likely because sending power out on a mini-USB socket would be a potentially disasterous contravention of an already ambiguously-implemented standard. Think what sort of confusion you'd get into if USB peripheral devices started trying to send current to the host (your PC, for instance). Those terminals help to disambiguate the otherwise dual nature of the PSP's USB interface, providing power to plug-in gadgets that would otherwise require their own power source (seeing as they're not being connected to a powered host interface, like the full-size 'A'-type sockets on your PC). It's a fairly neat idea to provide power to a PSP-hosted device via anchor points either side of the mini-USB socket, IMO - beats having batteries in the camera.

That wasn't very clear, was it? Too tired to make sense, sorry. Long day n'all. Goin'abed. G'night... zzz

[Tesseract]

Yeah, but I finally learned enough in another thread to abandon this train of thought. Previously, I had only been answered with silence. :P