Other pinball machines in the early 80's only stored the highest score, no initials, that didn't happen until alphanumeric displays came about in like, ooh, I dunno, I wanna say like '86 ish - Baby Pacman stores the top eight WITH INITIALS
On the SAME COMPUTER with the SAME 5101 RAM CHIP
And yeah, we know the initials and the other high scores live on the pinball computer, because that's the board the battery lives on and you can defederate it from the videogame computer and it still remembers
Now is that, maybe, why this game is only 2 players instead of 4 like every other early 80's pin? It had to sacrifice two players' game states' worth of memory space to keep track of initials and extra scores?
Also that'd free up 2 players' worth of display wires to communicate with the videogame computer
It's a miracle this thing works at all