When I first entered college in 1988 there was a small DOS compiler floating around called C-- back then, which I got from some BBS (yes, a BBS, how antiquated!), probably in 1989. It was a mix of a subset of C and proto-assembly. I have looked for it a few times over the years, and this one isn't it, although it has some similar ideas. It makes me wonder how many other little-known C-- projects there are.