Hi all, I picked up an HP 7220C flatbed plotter the other day which (after freeing the stuck carriage) is responding to panel commands in 'local' mode. For the terminal RS-232 interface, does anyone happen to know: a) The character size (7 or 8 bits)? b) If the connection between terminal and plotter is supposed to be straight through (i.e. 1:1 pin mapping), null modem, or something else entirely? I'm not sure if the plotter considers itself DTE or DCE, given that it has a modem output port (i.e. it sits partway along in the chain of things). Oh, there's a "conf test" switch setting on the back - does anyone know the purpose of that? I'm wondering if it's supposed to echo back to the terminal any data that's sent to the plotter, but that's purely a guess. Sadly there don't seem to be any docs online (or much in the way of any info, to be honest). thanks, Jules