Success!!! Thank you Liggy!!!
Your suggestions were right on.
I'm new to this forum so this was probably covered here before but since I couldn't find all the information right away I think I'll summarize my quest for making ND7550 work in my Toshiba Tecra M3.
ND7550 drive as well as many others is set as master by default which generates IDE #1 error upon boot in Toshiba laptops but the drive is accessible in windows if removed and reinserted.
1. Obtained ND7550. It's not as easy as you think. It's not widely available but I found one vendor who has them for $90.00 shipped. http://www.shop14035.com/
2. Downloaded Liggy's firmware and utilities.
I downloaded the following components:
Liggy's ND7550 Bitsetting Firmware 1.01
NEC ND7550 Firmware 1.P1
BinFlash 1.27 (http://binflash.cdfreaks.com is down at the moment)
NEC ND7550A Reverse ATA firmware package
3. Applied “Liggy's ND7550 Bitsetting Firmware 1.01” via binflash and set all available book types to DVD-ROM
4. Removed drive from laptop and connected it to desktop PC via adapter. (Availble for $7.00 + 6.02s/h from Logic Supply)
5. Booted PC with bootable CD created with standard NERO boot image and content of Liggy’s reverse.zip on the CD drive.
6. During boot up took a note of NEC drive placement (IDE channel, master position) then ran “B7550005.EXE /p:0 /d:0”. (Substitute “/p:0” with “/p:1” if connected to the secondary IDE channel.) Disregard instruction that came with reverse.zip.
7. Drive firmware got updated; drive however became unrecognizable by PC upon next boot.
8. Inserted drive back in Toshiba laptop; applied NEC ND7550 Firmware 1.P1 (http://liggydee.cdfreaks.com/download/7550/1p1_rpc1.zip)
9. Rebooted laptop; error is gone. Everything is working fine.
I now have ND7550 with Riplock and RPC1 patches as well as booktypes set to DVD-ROM. The drive works without any problems in my Toshiba laptop.
I am a happy guy now.
Just one observation.
Upon flashing the firmware with B7550005.EXE the drive shows up in binflash as having 0.05 firmware revision. Does it mean that B7550005.exe is just a firmware file and if so, can it be extracted for use with binflash?