To test your EPROM version:-

* Press DISK.
* Press UTILITIES (F8).
* Press DISK CONTROL (F8).

If release is less than 5.0 you will need new ERPOM chip from me.

Thanks,

AJ

PS: All X1/X4 users will need new EROM with package.
_________________________
[KETRON - USA]
Design Engineer & Product Specialist.
www.KetronAmerica.com