In 2015 I turned 40. I also got inspired to dig into the home computer from my childhood, the zx spectrum 48k. This may be a mid-life crisis thing, but if it is, it's pretty mild.
I've ended up doing enough stuff for the speccy for it to justify a new subsection of the site, so here goes!
Most of the sources to my projects are in this github. Image Spectrumizer github is here.
Online emulator
Image Spectrumizer
z80 tutorial
Speccy, Vol 1: Ressurrection
Speccy, Vol 2: Speccy 101
Speccy, Vol 3: Sprites
Speccy, Vol 4: Compressed Loading Images
Speccy, Vol 5: Making Releases
Speccy, Vol 6: Some Little Details
Speccy, Vol 7: SolarGun
Speccy, Vol 8: The 128k
Speccy, Vol 9: Attack of the RGBobots
Speccy, Vol 10: Rotten Egg Mines
Speccy, Vol 11: QuizTron 48000
Speccy, Vol 12: Mazeract
Speccy, Vol 13: 48k ZX Spectrum in a Nutshell