Here, most of the members of the forum understands English. Do not bother with a translation.

According to your question. Not all games loaders are able to work with other drives other than "A". Selection of the drive to read, in TR-DOS interface defines a drive selection signal. Pin 10 DS0 Select 0 drive (A). pin 12 DS1 Select 1 drive (B).


You need not direct, and "flipped" cable, look at the post above.