As far as I can tell, the NEC ND-6650A should be supported. However, when I plug in the one I have via USB (and it gets recognized by the operating system as /dev/scd1), then run the latest Linux/i386 version v1.52 of necflash, this is what happens:
% ./necflash -scan -v
Binflash - NEC version - (C) by Liggy and Herrie
List of supported devices:
Trying to query device /dev/scd0
device HL-DT-ST DVDRAM GSA-U20N HX12 unsupported
Trying to query device /dev/scd1
device _NEC DVD+-RW ND-6650A 1.23 unsupported
No supported devices found
Why is it "unsupported", due to the USB adapter, firmware version or what?
Edit: ah, so I needed to be root to access it. Sigh.