thank u all for the answers I find this
http://www.gp32x.de/board/index.php?showtopic=27289
but is this powered by the box or it use the standard DC?
From the above topic, first entry:
FAQ
Q1) Do I need a PSU?
A1) Yes you need a 12V DC adaptor to operate USB devices such as HDD, CD-Rom, Flash Disk, Mouse, Keyboard, Lan Adapter. However you don't need a PSU while you use TV-Out, Audio Out and Serial Connection.
Conclusion: this breakout box is NOT intended to power the GP2X via the EXT port.
I asked a similar question some months ago and concluded it would be
safer to avoid this approach since the internal voltage regulator would
see a voltage higher on its output than on its input. That's not the way
they are intended to operate, so you might run into problems.
Making a connection to the battery posts would permit you to move the
DC input away from the side of the unit and could be done with a simple
modification to the battery compartment cover, using a socket mounted
on the cover and two wires leading to the battery posts.