I haven't heard of any GRASS driver that will drive a plotter --
did you purchase the optional postscript card with your HP ? In that case,
you can use ps.map, or the "pnmtops" tool of the PBMplus tools to create
a postscript image and send that to the plotter.
Ronald Thomas ront@meeker.cfnr.colostate.edu
Natural Resource Spec. (GIS) ^^^ Phone: 303-586-3565 x285
Resources Management Division ^^ ^^^^^ FAX: 303-586-4702
Rocky Mountain National Park ^^^ ^^^^^^^ Estes Park, CO 80517