My ACER T180 contained a DVD drive withe the followindg details:
HL-DT-ST-DVD+-RW GSA-H21N RPC2
I couldn't find a RPC1 firmware upgrade, so I flashed with the following:
HL-DT-ST-DVDRAM GSA-H22N 1.01 RPC1
Everything appears to be working OK. No region protection and read / writes to DVDRAM.
Questions? Did I do any damage? Have I achieved anything (apart from being region free)?