Region = The world is devided into six regions (and international waters, air and stuff like that). DVD movies are region stamped so that you cannot play American dvd movies (region 1) in your European dvd players (region 2)
Region control = to check if the region of your disc matches the region of your dvd player. If it doesn’t and you still are allowed to change it, you may change it to the correct region.
RPC = region protection schematic. RPC 1 = no region added = region free. RPC 2 = region added in the device. You may set a region up to four times. After that the last chosen region is fixed in the device
The fun thing is that most RPC schematics are not in hardware (chips and transistors) but in bios eeproms. This is actually software, or rather called, firmware. And firmware can be hacked, reversed engineered, updated and changes. You can check www.rpc1.org if such a firmware has been made for your device.
These hacked firmwares can do several things which may or may not include
- RPC2 to RPC1
- Resetting region change count everytime the device is started (So you can change the region four times every reboot!)
- Setting the region code to region 0, so it will play any dvd
- Add bitsetting for DVD+R’s
- Remove the extraction limit. This may speed up copying entire dvd’s
- Remove the CSS copy protection on the fly (probably only old siemens)
Unfortunately there are several checks for the region
- The Operating System checks
- The device itself checks
- The playback software checks
They all have their own region code schematic and may or may not playback region free, hacked, cracked or other region discs.