I had a problem finding a driver for my SP1800 Plotter from Encad.
for Windows NT 4.0. users,
Go to add printer wizard,
Manufacturer, choose HP
Printer, choose HP GL / 2 plotter.
This worked well and maybe it will help.
The cabling required is a 9-25 pin null modem cable, 9800 baud rate.
For win 98 se, I have uploaded a driver I found.
Let me know if this helps.
PS I sure could use a owners manual on the sp1800. If you can offer any
info I would be grateful...
Thanks in advance...