"_doprnt" query

[Thomas Fravenhofer]

I am trying to get a screen editor working on my Fortune 32:16 system.  It
keeps crashing in the routine "_doprnt" (giving me a memory addressing error).
I can't seem to find any documentation on it.

Does anyone have some documentation on this function?  My system runs FOR:PRO
1.7, which is a version 7 derivative with a little 4.1 thrown it (as little
as they could get away with, anyway...).

Thanks in advance.

Tom