YouTube user under the nickname Danny Spencer released an interesting video. He demonstrated a calculator that he himself created based on cult retro game, shooter Doom.

He created a location where he built platforms and attached a control panel. The buttons allow you to enter numbers from one to nine. Each platform is a screen for displaying numbers “folded” of monsters.

Outwardly, it is actually quite spectacular, but the functionality is narrowed. The only operation the calculator is capable of performing is addition. The maximum amount it can process should not exceed 999. And you have to clean the screen with a machine gun, because the calculator does not have a reset button.

Previously, Adafruit, a company specializing in the production of open source electronic devices, installed a tiny screen in the Milky Way chocolate bar with the 1993 Doom game launched.