https://blog.pixels.camp/writing-a-zx-spectrum-game-6ffff2e5f10f

As part of our T-shirt challenge this year at Pixels Camp, we decided that one of the steps would require the hunter to access some sort of retro-computer in the venue, enter some secret codes, and get the instructions for the next step, if successful.

As some of you know, I’m a sucker for all things 8-bit. I had multiple Spectrum and C64 machines in my youth (still own a few today) and at that age, I was somewhat proficient at BASIC, Z80 and 6510 assembly code. I remember the days when all we had were the occasional programming magazine in the kiosk and the help of our close-by IRL friends. There was no Internet, no online PDFs, nothing. Access to information was expensive and scarce.