The zorland c compiler from zortech, x86 pc compiler from a small uk company.
i used it to write my final year project at college in 1988. sadly i couldn’t use the
interdata running v7 as i was doing image processing and needed to access an ISA
framestore card.
i built a motion compensated video standards converter, and thanks to the 80287 i managed
something like 6 hours per frame.
i think zortech claimed they wrote one of the first c++ compilers (rather than using
c++).
-Steve