Anyone have PSP schematics?

fakemail

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Hi, does anybody have schematics / circuit diagrams of the PSP? I would like to see the charging circuitry and see if I can have a USB charging add on internally to the PSP. Hopefully there will be some GPIO that goes high when enumerated to a PC, then I can use this signal to allow 500mA charge from a PC usb port....
 
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