On Thu, May 19, 2011 at 12:03 PM, Jason Stevens <[email protected]> wrote: > I'd try the 'modem' setup for the DZ ... I recall something similar > with Unix/32v > > set dz lines=16 > att dz -m 2311 >
Well, that sounded promising, but as far as I can tell, it made no difference at all. After a telnet session to the DZ port 8501, no matter how it terminates, the unit remains locked up for several minutes and cannot connect to the VAX emulation again. Eventually a security error is reported to the OPA0 terminal, saying that no input could be obtained from TTA0 and the connection has timed out. Then it is possible once again to connect through port 8501 for another session. Sessions work fine while they are connected. The issue is disconnecting and being able to reconnect. There appears to be some failure in handshake between the DZ emulation and the VAX driver, such that the closed telnet session, even if a hangup was sent, remains active (virtual DSR asserted, maybe?) for some length of time. This would be OK if the DZ emulation itself rotated through the available lines, sending the next connect request to line 2, and the next to line 3, and so forth, but it doesn't do that. As far as it is concerned, line 0 is now clear and the next SYNC results in a new connection to line 0. But the VAX driver isn't accepting that connection, or so it seems. The timeout seems to vary, anywhere from five minutes to fifteen or more. In one case the line was still tied up after sitting unused overnight. Just to clarify, as there seems to be some confusion, I want to use the DZ emulation to allow terminal sessions that originate on the same host box that runs the SIMH software to connect to the emulated VAX. This is not possible if the emulation and the host share the same NIC, but it can be done by going through the DZ, which provides a host-based port number. I am not trying to connect an actual VT terminal, and I don't see that the DZ emulation is really intended to do that. As for LAT, I found it cumbersome to use even when I had a real VAX and a real terminal server. It doesn't seem appropriate to this particular situation at all. --Gary _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
