Datavue OWNERS and Experts- read up!!!

[charles spell]

I sent this to reach a wide range of ibm pc compatible owners - perferably
the DATAVUE 25. This is my only source of info on this model. 

I have a 31-pin connector on the back of my DATAVUE 25. What is the schematic
of this port (Labeled EXT) and/or can I use it to connect to a IBM-PC (AT)
compatible short card? 

My main use would be to connect to an external hard drive if possible. Any
suggestions?