If understand Dennis Ritchie's explanation [1] correctly, he started with a compiler for the B language, itself written in B, and modified it to accept a somewh

If understand Dennis Ritchie's explanation [1] correctly, he started with a compiler for the B language, itself written in B, and modified it to accept a somewhat different language, which he called C. Before the B compiler written in B, there was a B compiler written in something else. I couldn't figure out what from that document. [1] https://www.bell-labs.com/usr/dmr/www/chist.html https://www.bell-labs.com/usr/dmr/www/chist.html