I've been using my plotter HP ColorPro 7440A successfully for many years in the past together with my Amiga Computer.
I would like now to connect the plotter to one of the serial ports COM1 or COM2 of my PC (XP system installed) and use the Microsoft Visual C++ (version 6) software to send instructions to the plotter.
What type of instructions should I write in my C program to open the port first and then get access to the plotter. May be a short test program should be useful to be sure that there's communication between them ?
Thanks a lot for your help.