2-digit 7-segment display
Ah those wonderful Turbo buttons with a 2 digit 7 segment display that was set just with a jumper board.
I used to (sometimes) wire those via a little homebrew logic to the ISA bus to watch POST codes as the machine was (or not, as often could be the case) coming up.
Given it was not particularly great deal of effort, I was somewhat surprised no case/computer manufacturer never (that I remeber) offered that as an option.
Biting the hand that feeds IT
