ROM files structure

[Black_Cat]

With mirror adress space is possible show all 65536 ports (state of all ZX ports - for all ZX interfaces with any ports).

What is the address for reading the port #FE?

---------- Post added at 23:47 ---------- Previous post was at 23:42 ----------

+2A and +3 use identical 64kB rom. A16-A18 not exist.

This is the address of the address space ROM drive, rather than a specific ROM.