Any Info for NND Nakanippon Robot Arm (Small)

Dear All
I am looking for information and particularly software to run an old NND Nakanippon Electric Co's 5 axis robotic arm. It was painted bright orange by the factory and consist of
1. 5 axis arm 2. Servo control box 3. Teaching pendant
The servo control box has a 25-pin RS-232 interface. I am wondering if anyone has any lead to obtaining a copy of the software to run the controls.
A few of the dimensions of the system are as follows:
Learning box ************ Size: 23x10x3cm Weight: 1kg Cable Length: 3m
Digital Servo Amp ***************** Size: 29x19x18cm Weight: 3kg
Robot Arm ********* Max vertical reach: 63cm Max horizontal reach: 46cm Rotation of waist: 270deg Weight: 8kg
Any lead on software or additional information is greatly appreciated.
Kind regards frank
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