Firmware information
  CD−R CD−RW DVD−R DVD−RW DVD+R DVD+RW
Strategies 1.15 1.14 1.19 1.22 1.22 1.23
Bitsetting   No No
Date1 (*) 2003-11-28
Date2 (*) 2003-11-28

(*) Date 1 seems to be related to the strategy version while date 2 seems to be related to the main firmware code

The following firmwares are included:

This is the original NEC ND-2500A 1.05 firmware.