The original Game Boy, released in 1989, was a hugely popular handheld gaming device — but it was tricky to program for.
A new video showcases exactly how the device’s processor worked, and how programming for the system required developers to understand that to make anything to appear on its screen.
The way people used to program games isn’t much like how they program them now.
It’s a fascinating look at one of the most successful handheld consoles ever, and it follows on from another video that takes a look inside its hardware.