eli5 How are people playing Doom on so many different (and usually very old) devices? A notepad, pregnancy test, how tf?

Question

Like how tf does one play Doom on a pregnancy test???????

In: 647

Answer 1

Here is the answer from one of the authors of the game, John Romero, talking about how this started, some technical details for what allows it to run everywhere, and why running it on an ATM, piano and pregnancy test is not that exciting (these are modern chips that can do a lot), while running it on a really old computer is much more interesting.