Aha, I checked, I was thinking of the Epson QX-10, which had something called Valdocs, that was originally written in Forth. Valdocs hit some roadblocks that F

Aha, I checked, I was thinking of the Epson QX-10, which had something called Valdocs, that was originally written in Forth. Valdocs hit some roadblocks that Forthers still debate about, and was (per Wikipedia) later rewritten in C.