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Liggy's and Dee's modified NEC and Optiarc firmwares

Everything about NEC ND7550A and ND7551A firmwares

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The slimline DVD Burner NEC ND-7550A was announced by NEC in December 2005 and hit the stores shortly after. CD Freaks has a NEC ND-7551A review available. The NEC ND7551 burner adds support for LabelFlash but both drives - together with the ND6750 and ND6751 - share the same hardware and only differ in firmware. However you should not try to simply flash a NEC 7551 firmware on a NEC 7550 drive or vice versa. This will NOT work. Click here for detailed specifications of the NEC ND7550A.

The following firmwares are available for download here:

Firmware version Download
NEC ND7550 Firmware 1.AE Download
NEC ND7550 Firmware K072 Download
Original NEC ND7551A firmware 1-02b Download
Original NEC ND7551A firmware 1-P2b Download
NEC ND7551 Firmware 1-P2 Download
NEC ND7550 Firmware 1.32 Download
NEC ND7550 Firmware 1.P1 Download
NEC ND7551 Firmware 1-02 Download
NEC ND7550 Firmware 1.01 Download

Overview on the used writing strategies

Do NOT try to crossflash between normal and reverse ATA firmwares by using Binflash. This is very likely to DAMAGE your drive or make it INACCESSIBLE!

If you need to exchange master to slave on your NEC ND7550A or ND7551A drive, you should try the NEC Bootcode flasher. For the drives without LabelFlash use the NEC ND7550A Master bootcode flasher and the NEC ND7550A Slave bootcode flasher while you have to use the NEC ND7551A Master bootcode flasher and the NEC ND7551A Slave bootcode flasher for LabelFlash capable drives.

If you prefer the original DOS software from NEC, you should use the NEC ND7550A Reverse ATA firmware package but be sure to follow the instructions:

  • It it highly recommended to use a slimline to IDE adapter and a desktop PC for this procedure instead of leaving the drive in your notebook. You might be unable to complete this procedure if the drive is still installed in your laptop. The drive has to be attached to the secondary IDE channel, you will probably get an error message on the primary channel.
  • Boot into plain DOS. A command prompt from within Windows does NOT work.
  • Execute the file 7550BTR.BAT
  • Reboot your PC. The drive should now be recognized as a slave device
  • Execute the file 7550MAIN.BAT now to flash the main firmware
  • After another reboot, your drive should be working again

Changing your drive back from slave to master is not yet supported.

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