I noticed yesterday that the original Ultima 7 required 2 MB of RAM and a 386 or 386SX [1]

You can buy a version from gog that runs on Windows 10 requiring 2 GB of RAM and an unspecified 1.8GHz CPU [2]

[1] https://www.mocagh.org/origin/u7completeaus-manual.pdf

[2] https://www.gog.com/en/game/ultima_7_complete