[sweetsocks21]

You might be thinking of the Taos Operating System?

https://news.ycombinator.com/item?id=9806607

http://www.uruk.org/emu/Taos.html

It had an object oriented assembly language that everything compiled to and it JIT'd/on-fly-compiled code IIRC. Sounded very cool.

[CyberRabbi]

These things always sound cool.

[pjmlp]

Unfortunely when these things actually suceed on the market, we only get IBM and Unysis mainframes, Android, watchOS and .NET Native/WinRT, which are always a kind of compromise of the whole idea.