Not necessarily. The word just means [trans]port to another platform. It's only relatively recently that writing automatically portable code has been possible, and even then there's usually some modification involved, otherwise we'd just call it "recompiling".

It has been used this way in relation to games for years. Game ports of the 80s and 90s very often involved complete rewrites from the arcade version, sometimes without access to even the original graphics.

I wanted to emphasise trying to stay as close as possible to the original as possible, while still being a C64 game. I didn't have access to FB source, so it's just reverse engineered. It's still in need of tweaks and fixes tho (I spent 2 days on it).