[cctalk] DEC VT340/330 ROM Cartridge

[Douglas Taylor via cctalk]

The DEC VT340 has a slot in the back of the terminal to insert a ROM 
cartridge.  I can't find any description of what this DEC labeled ROM 
cartridge would do for you.  I've seen them with V1.1 and V2.1 markings, 
does anyone remember what additional capabilities these ROM cartridge 
provide?

Doug