I’m new to these forums. I have an I-O Data DVRP-UN8PL2 slimline external DVD drive which reportedly (DiscInfo, Binflash) has an Optiarc DVD RW AD-7543B inside. The version number is “1-I0” (Nov 10, 2006) . Also I bought this in Japan, and based on a simple Google search it seems unavailable elsewhere…
I’m looking for a way to convert the drive to RPC1. However, I could only find firmware and information for 7543A and not for 7543B. Anyone has any experience with making this drive region-free? Or should I just go ahead and try flashing the 7543A firmware?
Any tips are appreciated, I also dumped its firmware with Binflash if it could help for figuring out the thing.