Glad you clarified and said Minix 3; I remember the 90s version had its own userland, and its own C compiler (also written AST), I know this because I hacked on

Glad you clarified and said Minix 3; I remember the 90s version had its own userland, and its own C compiler (also written AST), I know this because I hacked on them extensively. Probably the first time I have seen extensive source code, more than a snippet or a *.c file.