I waited for quite a few months to see if anyone would pick this up and no one has so I am looking into providing them for people pre-assembled so I will be needing the chips. I ordered some to try out and hopefully they work out, I will post info once I have gotten all parts in.Helder, if you don't plan on mass producing these boards, the oem Japanese back up ram carts have the suitable chips inside for harvesting. No reprogramming needed.
I didn't end up using a 47uf cap. @tzmwx Would you recommend adding the capacitor, or okay operation to leave it off?