ChibiOS 2.6.8, until I can figure out where to get it from git.

firmware/chibios/demos/Win32-MinGW/readme.txt

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+*****************************************************************************
+** ChibiOS/RT port for x86 into a Win32 process                            **
+*****************************************************************************
+
+** TARGET **
+
+The demo runs under any Windows version as an application program. The serial
+I/O is simulated over TCP/IP sockets.
+
+** The Demo **
+
+The demo listens on the two serial ports, when a connection is detected a
+thread is started that serves a small command shell.
+The demo shows how to create/terminate threads at runtime, how to listen to
+events, how to work with serial ports, how to use the messages.
+You can develop your ChibiOS/RT application using this demo as a simulator
+then you can recompile it for a different architecture.
+See demo.c for details.
+
+** Build Procedure **
+
+The demo was built using the MinGW toolchain.
+
+** Connect to the demo **
+
+In order to connect to the demo a telnet client is required. A good choice
+is PuTTY:
+
+http://www.putty.org/
+
+Host Name: 127.0.0.1
+Port: 29001 and/or 29002
+Connection Type: Raw