[rbrtrbrt]

Anyone have an idea why there's sourcecode for (apparently) a pinball machine in there?

http://www.ibiblio.org/apollo/listings/Luminary099/PINBALL_G...

It's in the code repository for multiple Apollo's

[th0ma5]

If you read the code, it seems to suggest this is just the (fun) name of the lit display driving code.

[mladenkovacevic]

I believe pinball was the name of their keyboard and display program (not an actual pinball machine)