Thanks to Sellam, I've found a place where I can purchase the manuals for these two plotters. Not free or cheap, but I guess I have to pay the price since I could not find them anywhere else! For others who are interested, the site is: http://www.manualsplus.com Ashley ----- Original Message ----- From: "Ashley Carder" <wacarder(a)usit.net> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org> Cc: <info-pdp11(a)village.org> Sent: Thursday, January 27, 2005 11:59 AM Subject: HP7200A, HP7210A Plotter documentation needed Does anyone on the list have any documentation on the HP7200A or HP7210A plotter? I am getting an HP7210A plotter today, but I don't have any documentation on it. It looks exactly like the 7200A, but it appears to have a few more knobs or controls on it, based on the photographs I've seen. I'll know more when I actually get my hands on it (tonight). These plotters date from the early 1970s. We had an HP7200A at Wofford College in the 1970s. Ours was mapped to KB7: and we had numerous plotting programs written in BASIC-PLUS under RSTS/E on a PDP-11/40. I have copies of all the programs that we had for interacting with the plotter. I just don't have any info on hooking it up to the computer. I'm planning on interfacing it to my PDP-11/40 via either a 20mA or an EIA DZ11 port. Thanks in advance for any insight or info that anyone can provide. Ashley