PROMAC 2A Eprom Programmer

Hello at all, i have the programmer from many years in a box. Its firmware make work it in automatic way so it is not possible (or almost this is aall i know) to drive it from its buttons. When i power on it, it trys to send somenting via its serial RS232 to the host computer. I checked the serial port for a null modem way to work and if i load hyperterminal i see some unknow characters on the screen, and if i push a key on the keyboard i see that something goes via serial to the programmer. If i try to change the serial speed or character lenghts or its parity the characters on the screen not become intellegible. At the end if i try to load its original DOS program (not in a window of windows XP, but making a DOS 3.3 boot!) after done the check i said, neither the DOS software can drive the eprom programmer. Here all information i found across internet: <http://elazzerini.interfree.it/Promac%20Model%202A.htm> http://elazzerini.interfree.it/Promac%20Model%202A.htm Thanks for any suggestions. Enrico