The Falcon030 microbox was designed to be used either vertically or horizontally. Image source - https://www.atarimuseum.de/falcon030.htm
The funny thing is that I was looking into assembly compilers on wikipedia, which led to external reading about rmac, which then led to MiNT, which finally led to the Atari Falcon
Heh I was one of the 12 people who actually brought a Falcon. Sadly I don’t think I ever made the most of it. It took me years to get documentation on how to load code onto the DSP and by that point I got my first PC.