How To Make A "Dual Boot" EPROM

With the introduction of RCE encoded DVD discs, the need to have a proper region set to play the disc has become an issue. Gone are the days where Region 0 (region free) works for all DVD discs because the latest releases have this "RCE" encoding to stop Region 0 from working.

If you live in America then you get access to pretty much all the DVD titles available, so all you have to do is make a Region 1 firmware and you are set There is no real need for a "Dual Boot" machine unless you have some imports. But for places like here in Australia (Region 4) we are not so fortunate. By and large our choice to "older" or classic DVD titles is still limited, and even if we get a title (new release or old) released here, generally the Region 1 version has more content (previews, trailers, deleted scenes, etc).

First, the standard disclaimer:

DOING THIS MODIFICATION NEEDS SOME ELECTRONICS EXPERTISE. IF YOU FEEL YOU CAN'T DO THIS MODIFICATION BY YOURSELF, SEEK ADVICE OR HELP FROM SOMEONE WHO CAN. I WILL NOT BE HELD RESPONSIBLE!

Are you still with me? Good! Let's get on with it.

There are two ways of making a "Dual Boot". You can use a single EPROM which can hold two firmware versions, of you can use two EPROM's each with their own firmware and switch between them.

Choose which method you want to look at:

One EPROM sytle......................Two EPROM "PIGGYBACK" style.