[Coco] Help with Jeff V. Coco3 dos emulator

[Robert Gault]

To prevent confusion, here is more information about the JVC emulators. You 
would expect them to make use of the JVC disk header information, making the use 
of double sided disks transparent to a user.

The two versions of the JVC Coco3 emulator I have 1.71 and 1.91 ignore the JVC 
disk header. Other versions of the emulator may support disk header info. There 
will be problems using NitrOS-9 disk images with the above emulator versions.

Robert