Reading chip content, and make a copy?

Forum 2005-2010 (read only) General Frequently-Asked Questions
2

You can use the ISP sketch to program any chip externally (including setting the fuses).
(e.g. Arduino Playground - MegaISP )

You can change that code to program autonomously rather than waiting for STK500 commands (this needs some understanding of the code).

Then just make a copy of the upper part of its own FLASH, byte by byte.
Don't forget to also set the fuses!

Edit:
With the help of a PC it is just this: http://arduino.cc/en/Tutorial/ArduinoISP