edwin@maui.cs.ucla.edu (Edwin Tisdale) (03/06/91)
I am trying to connect an IBM 6180 Color Plotter to an IBM RT PC 6150 Model 125. A Serial Printer Cable (Option Number 6294803) connects the plotter to the computer through the port labeled ``S2' on the Native Asynchronous RS232C Adapter. The system runs under the latest version of "4.3 BSD UNIX (6151)" which refers to the adapter as the "planar serial port RS232C interface". If "plotfile" contains a short list of IBM-GL instructions, then the command "cat plotfile > /dev/ttys0" generates the expected plot. But if "plotfile" is much larger, then the first part of the plot is correct and most of the remainder is garbled. It appears that the plotter buffer is being overrun. I need to know what hardware and/or software handshaking signals the plotter and computer interface expect. I also need to know how to set up these signals using UNIX commands. The IBM manuals that we have for the plotter and computer are not very helpful. Appropriate references would also be appreciated. Thanks in advance, Bob Tisdale - UCLA Computer Science Department - Los Angeles, California