I this video, I install a Unix variant called Fuzix on the RC2014:
No new hardware is introduced in this video, I use the same Flash-ROM/RAM board that I used for RomWBW. Thanks to William Sowerbutts for pointing me to the distribution and helping me along with a few issues.
There were a couple of changes necessary to get FUZIX to work on my RC2014. Most significantly, I added support for the SIO/2 and ACIA. I also removed support for the real time clock and faked it out to always return a time of zero. You can find my changes in my fork of fuzix at https://github.com/sbelectronics/FUZIX.