I was a MC680x0 maintainer back in those days. Also picked up i860 for the gcc 2.x stream. Fortunately I was at UMich in the gcc 1.x time, and we had NSFnet.
And yes, I used RCS when working on the gcc source.
Nice to meet you! :-) I still (barely) remember one bug which gave me a hard time - when compiling for 68030, I believe, under certain conditions gcc put floating point variables initialized with a constant into the constant segment. Which caused access violation when code tried to put something else into this variable. Or something along these lines, when was that, 25 years ago? Circa 87 or 88.
We used 860 (not sure) and 960 (definitely) too for other products.
And yes, I used RCS when working on the gcc source.