This document describes how to use the Microsoft HyperTerminal application in order to prove that your Brainboxes serial card is functioning correctly. This assumes that the card is correctly installed. Windows 2000 Professional is used in the example. However, the document also applies to Windows 9x, Millennium, NTx and XP. In this example the card installed is a CC-257 RS232 2-port PCI card on “COM1” but it can be applied to any COM label.

Create a loopback connector as described in this FAQ


From the Start menu select Programs\Accessories\Communications\HyperTerminal or perform a search in My Computer for “HyperTerminal”. If your version of windows does not have hyperterminal download the trial version here:

Download the pdf below and follow the steps provided



RS232/422/485 Adaptors>>