DOS 3.1, official version (Score 1)

Schneider PC1512 - a 8086 with 512K ram. Still runs like a charm with DOS 3.1, officially bought version on those lovely bright red & yellow 5.25" floppies. I found the registration card for that DOS some two years ago and sent it to microsoft, checking the "free trial" section for cobol and fortran77. Never got a response. So long for MS client service. I'm planning on using the babe as a terminal for my desktop. But that's just an idea... if anyone has experience or better idea about such a setup, comments?