Compatibility with two-button C64 controllers

Hi, is it possible for the iCode Uno/Duo Plus to recognize Commodore 64 controllers with two buttons?  These are not very common (they came out with the ill-fated Commodore 64GS game console) but there are quite a few games that make use of the extra button.  The first fire button connects pins 6 and 8 as usual.  The second fire button connects pin 9 (PotX) to pin 7 (+5V).  It would be great if this could be recognized by your adapter.  Thanks!

More information on these controllers is at: https://github.com/crystalct/5plusbuttonsJoystick