If your Wyse terminal is faulty, or you do not have one, then it is possible to use a regular PC with an RS232 port to emulate the Wyse.
Windows hyperterminal can be used, even with Windows XP and Vista.
The link below has the hyperterminal settings file which can be used.
If you download the file, place on your desktop, and double click the Cap.ht Icon, then hyperterminal should load with the correct settings for Capricorn.
Cap.ht is setup to use COM 1, but you can change hypertermanal to use COM 2 if COM 1 is already used on your PC.
The same serial cable as used with the Capricorn Wyse terminal can be used.
Cap.ht Right click, and select Save As to download to your PC