[GreenKeys] Teletype model 43 RO

[Dave Horsfall]

On Tue, 15 Dec 2015, Chris Elmquist wrote:

> If the printer has flow control then this also usually means it has some 
> kind of buffering and some intelligence to manage that buffer.  The CTS 
> signal will go false when the buffer is getting almost full and allow 
> the printer to catch up before setting the CTS true again and allowing 
> the host to send more characters toward the printer.

Printers can also use XON/XOFF as well, for the host devices that do not 
support RTS/CTS; I've also seen DSR/DTR used too.  I have no idea whether 
any TTYs used these.

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."