On 1/31/2015 2:56 AM, shadoooo wrote: If you get the patch to work with SIMH to a tty port, Vmware ESXI server supports connecting the emulated serial ports of two virtual machines together. What I have rigged for many test setups if one machine running the simulation out to what is a serial port on the emulated guest. Usually use linux, as it is easier to see the real status of the serial ports with Linux. I then run the other guest with one of its serial ports connected to the first guest's serial port. i usually use a copy of a system called Pick which has serial ports for expansion. It runs as one guest on the vmesxi system. It can support 2 serial ports, connected to another machine. I then have a copy of linux running in another guest. I can use minicom to connect to the Pick system remotely, since Pick only supports connectivity via the console / keyboard and serial, no network stack. Hope this might help. You won't have to experiment or debug on any vintage hardware till you have it working on SIMH. Jim

On Saturday, January 31, 2015 at 11:56, shadoooo wrote: The current SIMH 4.0 manual says in section 3.14, "Console Options:" A simulator console can be connected to a serial port on the host system. SET CONSOLE SERIAL=ser0 connect console to serial port ser0 SET CONSOLE SERIAL=COM1 connect console to serial port COM1 SET CONSOLE SERIAL=/dev/ttyS0 connect console to serial port /dev/ttyS0 The available serial ports on the host system can be displayed with the command: SHOW SERIAL display available serial ports on host Serial port speed, character size, parity and stop bits can be indicated on the by appending the speed, character size, parity and stop bits to the serial port name: SET CONSOLE SERIAL=ser0;2400-8N1 This will connect at 2400 with 8 bit characters, no parity and 1 stop bit. The default serial speed, character size, parity and stop bits is 9600-8N1. This capability was added in 2012, I believe. -- Dave