Changing cyclone II I/O current strength without re-synthesis

[Altera_Forum]

Hi, 

I would like to change several FPGA IO's current strength but without re-synthesis the project. the project is old and already functions "on the field", hence, we prefer to reduce risks as much as possible by not re-synthesis. all relevant I/Os are LVTTL/LVCMOS. is it possible?  thanks

[Altera_Forum]

Google "altera morphio" and check out the Morph-IO white paper. It might have what you are looking for. 

 http://www.altera.com/literature/wp/wp_morphio_reconfig.pdf  Cheers, Dave

[Altera_Forum]

If you still have the original project database and the Quartus Version installed that generated it, current strength can be changed in the chip editor.

[Altera_Forum]

--- Quote Start ---  If you still have the original project database and the Quartus Version installed that generated it, current strength can be changed in the chip editor.  --- Quote End ---     Thanks for the answers. Which stages of the design synthesis will be changed when using the chip editor to drive different current strength? do i have to use the same quartus version as used in the original generation?