I mess around with old computer architectures as a hobby. This website is a place to capture and index my activities.

I hope it helps you find things to build upon, or enjoy for yourself.

All of what I produce is and will be as open source and freely licensed as I can make it. In the past I have assembled and sold some of these, but I no longer do that. I do not find that an interesting use of my hobby time.


The TI-99/4A was my first home computer. But I am always curious about other 1980s and 1990s home computers. Back in the day, I used to belong to the Kitsap 99’ers computer user group. We didn’t have the internet, and had to learn things by meeting in person.

My early home computer timeline:

  • 1983-1991: TI-99/4A
  • 1989-forever: PC
  • 1991-1992: Amiga 1000

I picked up a used Amiga 1000 after I already had a VGA capable PC. In some ways I was retro-computing already. Those old machines have all been lost as a result of moves and my short-sited imagination. Lots of regrets there.


Today, I have a room full of things fighting over screen and desk space. Most of the computer systems beyond the TI-99/4A, I own so that I can take inspiration from them when developing for the 4A.

Systems I play with:

  • TI-99/4A - Released 1981
  • Tomy Tutor - Released 1982
  • Commodore C64 - Released 1982
  • Myarc Geneve 9640 - Released 1987
  • Panasonic F1-A1FX MSX2+ - Released 1988
  • Commodore Amiga 1200 - Released 1992
  • GR8BIT - MSX2+ I built it from kit the summer of 2018

-M@