> Also, I have simh running on a SheevaPlug plug computer under Debian linux > which provides a UART and USB for serial connections (it has no PC type > console). I use a serail terminal emulator as the console, but If I had a > Decwriter or a teleetype it would work.
If I remember correctly, the SimH serial-port emulation relies on telnet. Awhile back I tried to attach a real VT420 to a SimH/VAX instance running OpenVMS 7.3, and as I found out it's not really the same as running a VT420 attached to a real VAX. To gain access to SimH using the VT420, one first has to get the VT420 connected to the host computer (running Linux in my case, so I used the computer's serial port and a serial console - getty). From there, one must telnet into the VAX, either using OpenVMS TCP/IP Services or using SimH's serial-port emulation. No matter which way I tried it, the Linux telnet code caused various glitches and annoyances. Eventually I did get it to work satisfactorily, but only at 9600 baud. All the gory details (which I no longer recall) are archived for posterity on comp.os.vms. In the end I found that the best results came when I used LAT instead of telnet. Linux supports the LAT protocol via LATCP, and of course OpenVMS supports it natively. Bottom line: avoid telnet. While we're in "wish list" mode, I'd like to see SimH emulate Alpha or Itanium, so I could use it to run newer versions of OpenVMS than 7.3. There are free versions of commercial Alpha emulators available, but they only run on Windows (BLEAH) and their performance is intentionally limited, presumably to get people to buy the full version. _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
