OK, interesting. Here's what I learned by trying the "VH" device (that's a DHV11, right?)
Though it is supposed to represent 8 lines, it created 16 terminal devices in VMS. There are 8 TTnn devices and 8 TXnn devices. I believe these are all programmed I/O, so the load on the processor increases as it has to poll all those ports. There does seem to be a noticeable slowdown in response. However, with default terminal settings it does work much more sensibly. Telnet to the designated port brings up a login prompt immediately upon pressing ENTER. After a logout, the telnet session is not disconnected unless you close the telnet application. However, you can reuse that same telnet session without closing it, by just pressing ENTER again to bring up a new login prompt. In other words, the telnet client looks like a dedicated serial terminal and behaves accordingly. I see the VH device allows individual lines to be programmed as "modem" and "disconnect" which probably means that if those options are combined with SET TERM/MODEM on the VAX itself, the sessions will actually disconnect on logout more like a normal telnet session. I'll have to try that. The main drawback to VH is the fact that it creates way more virtual terminals than I need and seems to have an impact on VMS performance. As a workaround, though, it certainly is better than the way DZ seems to operate at the moment. --Gary _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
