ROM files structure

[Black_Cat]

My idea: create new CPLD based port decoder for reading this ports. CPLD will configurable (contain switches for set ZX models/clones).

Why create a new design, if sufficient to change the contents of the CPLD K-MOUSE TURBO 2008? My idea: create a CPLD update for K-MOUSE TURBO 2008. At Christmas, users using the K-MOUSE TURBO 2008 will be happy to update this device.

Adressation of port #7FFD is also different on ZX128,+2A,ZS Scorpion and russian ZX clones.

Forget about the Russians clones. On the Russians clones of K-MOUSE TURBO 2008 would not apply. Bus ZX BUS in ex USSR is not used, only used NemoBus.

Adressation of port #FE is different o ZX Spectrum models and on TIMEX.
ZX use adressation A0=0 and TIMEX use full adressation A0=0 + A1-A7=1.

For Timex and ZX Spectrum, you can create different CPLD.

Any write to port 1FFD rewrite port 7FFD in K-MOUSE TURBO (K-MOUSE ignore A14,A13,A12) = reading is usable only on ZX128/+2 and Pentagon.

Earlier this for you was not an obstacle. So in K-MOUSE TURBO 2008 for the ZX Spectrum +2a/+3 this feature will not be used.