Changes
/* Technical */
* Uses NMI
* Doesn't capture the hardware state like the Multiface does. Code in the ROM reads the hardware state which it restores when resuming the program.
* When a write happens to their RAMDIS is asserted when ROM or RAM it appears to are active meaning no write through to the RAM ram behind??.
* Menu code is at offset &3810 and is copied into RAM at &A200.
* Uses port FBF0 (output), FBFF (input).
