FreeDOS helps keep those decades of computer history accessible ... Microsoft has published the source code for old versions of MS-DOS for historical preservation, but the latest open-source ...

Among old CPUs, the 6809 never got as much attention ... Now [Dave] has reconstructed that computer on breadboards and it looks great. The files are on GitHub and there is even a series of videos ...

Unless you're ready to dedicate a whole computer to the DOS life, setting up FreeDOS requires ... The program will boot, and you’ll be presented with an old-school terminal.

After a great overview of the DOS API elements that were key to getting anything done back then, malware or regular programs alike, he dives into his efforts to mine an archive of old DOS viruses ...