The Retro Challenge is a one-month long excuse to do cool stuff with old computers and blog about it (vaguely wrapped up as a competition).

In 2017 I created the RetroMatic 2000 as my entry.

In 2018 I tried to restore two Osborne 1 portable computers. One restoration was completely successful, but with the other I couldn’t narrow down the problem in the disk controller as I lacked sufficient test equipment.

This March I’ll be doing a light-weight entry to the Retro Challenge as I don’t have too much time available.