Several years ago I wanted to hookup and old VT320 that I have and I did manage to get it to work but I did not go with the direct serial I/O connection in SiMH. Instead I found a program called TCPToSer that established a TCP/IP connection from the serial port. It worked fine with a USB to serial adapter that I had and I pointed the application at my SiMH TCP/IP port. This was way back in the mid-2000's. The application was available from www.tcptoser.de but that URL is now dead. A search did turn up a download from a site starting with "brother" but it is infected with Win32/Spursint.F!cl. If a clean copy of that software can be found, it does work beautifully with SiMH. I was able to navigate around EDT very nicely using the GOLD key and various sequences my fingers still remembered LOL.
On Tue, Dec 5, 2017 at 1:40 PM, <simh-requ...@trailing-edge.com> wrote: > ---------- Forwarded message ---------- > From: Peter Allan <petermal...@gmail.com> > To: "simh@trailing-edge.com" <simh@trailing-edge.com> > Cc: > Bcc: > Date: Tue, 5 Dec 2017 17:56:29 +0000 > Subject: [Simh] Problem using a real VT terminal with simh > I am trying to get a real VT420 terminal working with a simulated micro > VAX 3900. However, I am having problems getting text displayed on the > screen of the VT420. > > The host for simh is a standard PC running CentOS 6.9. > > I am connecting the VT420 to the PC using the 25-pin RS232 connector at > the back of the VT420, going via a 25-pin to 9-pin adaptor, to the 9-pin > RS232 connector on the PC. I am convinced that the physical connection is > correct since I can start an agetty process at boot time and log into > CentOS from the VT420. Everything works and displays as I would expect. > > For what follows, I have removed the starting of the agetty process so > that nothing is controlling the /dev/ttyS0 device before I start simh. > > The simulated microVAX 3900 is running VMS 7.3 from an RA92 disk. This > configuration has been running successfully for a long time and I am only > now trying to add the connection of a physical terminal. > > In the vax.ini file, I have added the lines > > SET DZ LINES=4 > ATTACH DZ LINE=0,CONNECT=SER0 > > Once the microVAX has booted, if I hit Enter on the VT420, then I can see > that a login process starts on the simulated microVAX, but all I see on the > screen of the VT420 is a few garbage characters. Despite that, when I type > a username and a password, I do get logged into the simulated microVAX. Any > commands that I type on the keyboard of the VT420 appears on the screen of > the VT420 (except the password, of course), but anything that the microVAX > is sending to the VT420 appears as garbage. There are recognisable > characters, but if I TYPE a file, even a small one, what appears seems to > be every 7th character from the file starting with the first character. The > output of commands such as DIR appear to have the same problem. > > Furthermore, when I log into the microVAX, the VT420 goes through a reset, > as though I had turned it off and on. I think this is because the login > sequence does a SET TERMINAL/INQUIRE since if I type that command, exactly > the same thing happens. This seems particularly odd since I have used that > command many times with a real computer (although admittedly not with this > particular terminal) and I have never seen this happen before. > > The VT420's RS232 port is set to a speed of 9600, with 8 bits and no > parity and the TTA0: device on the microVAX also gets set to this > combination. > > Hopefully I am just doing something wrong, but I can't see what that might > be. Can anyone help with this please? > > Peter Allan > >
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