[Discuss-gnuradio] Restore USRP2 images to support old USRP2 (Not UHD) code

Hi All,

I have burned the USRP2 to support the UHD, but now I need to run some old USRP2 code.

The new burned USRP2 images don't support the old code. So, is there any ways I can restore 

USRP2 images to old version to support the old code?

Any help is appreciated, thanks in advance.

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Wenbo