The tandems I listed above, originally used lock stepped processors, along with stratus/etc. edit: Googling yields few results that aren't actual books, Try th

The tandems I listed above, originally used lock stepped processors, along with stratus/etc. edit: Googling yields few results that aren't actual books, Try this https://books.google.com/books?id=wBuy0oLXEuQC&pg=PA218&lpg=PA218&dq=tandem+nonstop+lockstep&source=bl&ots=8zSlQDK79w&sig=ACfU3U15AHxS58ij3JVSAt7hNZ839ZNJEg&hl=en&sa=X&ved=2ahUKEwjP7brlte72AhVWmmoFHRLtD3QQ6AF6BAgkEAM#v=onepage&q=tandem%20nonstop%20lockstep&f=false https://books.google.com/books?id=wBuy0oLXEuQC&pg=PA218&lpg=...