I have the Mad Dog version of the ND-4550A and I flashed it with Liggy’s RPC1 Bitsetting 1.07 NEC firmware.
I noticed that both with this firmware and the original Mad Dog firmware, the reading of dual layer discs (original and burned on Verbatim DVD+R DL) was slower than my Plextor PX-716A.
I think I read that this does not have Rip-Lock like some of the earlier NEC Drives, but I used Media Speed Code Edit 126.96.36.199 and I opened Liggy’s modded firmware and checked the “increase read speed” box and wrote it to a new firmware, which I subsequently burned.
There was no increase in read speed, and if anything maybe a slight decrease. Curious - I decided to do a binary file compare of the two files and I found that the speed patched changed 10 bytes:
the string “VIDEO_TS” in the original firmware was changed to “FASTFAST” and there were two more bytes at a higher address that were changed also, but they were extended ASCII characters.
Does “FASTFAST” tell older NEC Drives to read DVD-Video discs at the same speed as data discs?
Also, I noticed that the speed edit program does not allow changes to the speed settings for the various media. Is this because the support of the NEC ND-4550A is realatively new in this program?