flash@lehi3b15.csee.Lehigh.EDU (Stephen Corbesero) (09/23/89)
I have 12 of the AT&T Multi-Tasking Graphic terminals (MTG-630) hooked up serially to ethernet terminal servers (Bridge/3Com CS/210) and I have two distinct problems. 1) I have already discovered and verified with AT&T that the layers environment will not run across an ethernet link. They have no plans to fix this problem. 2) The terminals do need some sort of flow control. XON/XOFF to the terminal server works fine, but giving up ^S and ^Q is just not feasible. The terminal manual lists RS-232 pins 4 & 5 (RTS & CTS), and the terminal server documents it as a supported method, but apparently the terminals do not use them. With respect to the first problem, I will be trying to get the "stand-alone" graphics routines to run in a single-tasking mode. If someone has already worked around this problem, perhaps by rewriting the the sxt drivers, I'd appreciate any information. With respect to the second problem, I have found a set of LF and CR delays values that seem togive the terminal enough to time in both line-oriented mode and screen-oriented modes. I regard this as a kludge, and I would prefer a better solution. I am really stunned that such a powerful terminal (with 2 MB of memory!) requires flow control, and that there is apparently no hardware flow control. Any information or experience in this area would also be greatly appreciated.