On Wed, 12 Dec 2012 17:55:37 -0800, Andrzej Kobus wrote:


I think I need to go to a museum to get a PC with a serial port

The pin-outs are available on the 'net.
A search for "d-9 serial pinout" will find what you need.

There is a still a lot of workshop and test-bench equipment that uses
serial connections. For some things you want a serial connection that can
be secured with screws and is not easily jerked out like a USB plug.
Fortunately multi-port serial PCI adapters are easy to find if your PC
doesn't do serial.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
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