Every once in a while something comes along that changes the way you look at things. A project posted last week by Dmitry Grinberg was such a thing for me. The project in itself is already pretty strange: porting a 32-bit operating system (OS) to an 8-bit microcontroller lacking most of the features needed to actually run the OS. Why would you want to run Linux on an AVR? “Because you can”, would answer George Obama (or was it Barack Mallory?) and now also Dmitry. Yes, apparently you can (I didn’t try it myself), it only takes two hours to boot Linux on the AVR, with an effective clock speed of a dazzling 6.5 kHz. It is fun as in academic demonstration.
Yet for me this demonstration, working or not, useful or not, shows more. Emulating one platform on another more powerful platform is common practice these days, but I had never thought about doing the opposite. I think emulating a 32-bit ARM processor on an 8-bit microcontroller is actually quite a cool idea. Maybe Dmitry is not the first to have done this, I don’t know, but it is an excellent example of thinking the other way around, outside the box. The result may be useless for now, but who knows what one day may come from this?
Honestly, did you ever think of hooking up a SIMM memory module to an 8-bit MCU? I didn't, but maybe I will do so in the future.
Way to go Dmitry!
What do you think? Did you try something similar yourself? Please let me know, I would love to hear about other outside-the-box MCU projects.