* Dissassembly of the code indicates it uses an I/O port &f0e0, and sends the data 0,1,2 or 3. It is not clear the function or the exact decoding of this port.
* It is restricted to loading/saving using DATA format disc.
Unanswered questions:
* What is the decoding of the I/O port?
* Can the ROM be paged in and read through software?
* What is the disc format supported by the disc wizard?
* Can you have other files on the disc at the same time or is it a special disc format?