I had a look through my DEC Catalog 1991

VT1300... 8MB RAM 1280X1024 66hz graphics, eight plane graphics
C VAX processor 90ns

As mentioned upgradeable to a VS3100 Model 30 SPX. I t appears as if 
the software is downloaded from a host machine on boot of the 
terminal. Reference was made to VAXELN Windows server software (EWS).

The part number to upgrade to a diskless VS3100 is

PV01U-AA

This will then require other upgrades to allow local disk storage.

Hope this helps


--
Dave Arthur
Business Department
Burridge Campus
Nova Scotia Community College

CANADA

arthurdc@burridge.nscc.ns.ca
http://www.burridge.nscc.ns.ca