USB access

[MindWall]

is something like that possible when it comes to PSP?

There is a digital camera Canon 300D, which was crippled by software means when compared to its bigger brother 10D.
So there was a hack performed, USB hack was done to access directly the flash memory drive, the firmware was pulled.. and etc. etc.

here are details of how the hack was done:
accessing firmware
http://www.alexbernstein.com/wiki/HomeP ... ngFirmware

USB protocol used by Canon cameras have been reverse engineered by folks at gphoto to enable using them with Linux. Additionaly, a simple application s10sh has been developed that uses this protocol to send "arbitrary" USB commands to the camera. Using s10sh, it is clear that in addition to CF picture storage drive (C: or D: ), two other drives A: and B: are present in the cameras. Drives contains DOS executables that controls many functions of the camera.
After mucking around for a few hours with my 300D, KnoppixLinux-on-CD, and making a few trivial changes to s10sh to support 300D here's what I found on my 300D (v1.1.1 firmware):

s 10 sh

Linux utility that allows communication with Canon cameras via serial or USB ports. In addition to being able transfer files from and to primary CF storage (seen as drive C: or D: ), it lets you view (and modify ?) contents of internal camera flash memory appearing as drives A: and B:

http://www.gphoto.org/
http://www.reynoldsnet.org/s10sh/
http://www.freebsd.org/cgi/cvsweb.cgi/p ... ics/s10sh/

USB and Linux:
http://libusb.sourceforge.net/
http://www.linux-usb.org/
http://usb.in.tum.de/download/

USB specs:
v1.1 http://www.usb.org/developers/docs/usbspec.zip
v2.0 http://www.usb.org/developers/docs/usb_20.zip

[cheriff]

Possible, IF the psp happens to be listening for undocumented commends on the USB port and IF you could find what they were and how they worked, then yes.
Otherwise no.
And i must be getting old, i could have sworn i read about the cannon300D in a previous post...