Serial link bug in 3174 substitute system is corrected!

Andrew Kay, the designer of the 3174 substitute project (Andrew's project page)has hunted down and exterminated the bug that caused the spurious character injection into the serial stream. It was not a flaw in his code but some undesirable behavior of the pyserial library interface with Windows drivers for the USB port and virtual COM port. Having spotted the conditions that triggered this misbehavior, he changed his code so those conditions did not occur. 

Now that this works, I can continue with two minor projects. The first is the exploration of the behavior of my 3178 terminal and experimentation with different streams of commands. The second is the installation of Andrew's full 3174 emulation package and testing with that. The package will allow me to use my physical 3178 terminal with real and virtual mainframes, particularly Hercules the mainframe emulator.