I got my Twin Fami in the mail today to start restoring. When you turn it on it shows a blue screen, so I thought it might be memory issues. I tested the 7805 and it's actually not regulating. I had 9v in, ~8.3-9v out!

I tested it on 7.5v and it was outputting near 8v.
I am replacing it with a switching regulator, but I'm hoping the IC's didn't fry. What is the maximum safe voltage the chips can take?