In Epic Pinball (and Silverball), during gameplay, if you pause with Esc and press F1 the game asks you to enter some params and press Esc to resume.

https://i.imgur.com/V1yNI2q.png

Does anybody know what these params could be? There's no visual response from the game as you're typing. I've managed to crash the game from pressing random things here.

I assume that it would be debugging parameters, either something to do with a second monochrome screen display or a serial connection to another computer.