hi i just got one of these AipTek HyperPen 6000
using my 1200 tower
as you need first to have a 25pin to 9 pin serial adapter in the serial port to connect the 9pin connector
then a 5pin din to 6pin ps/2 adapter used on my a4000 keyboard to power the with the 6pin ps/2 socket
then plug my a2000 keyboard into the 5pin din socket on the tablet
now works brilliantly