TRDOS 6.11P

[Black_Cat]

IF trdos rom is connect, can external device disable this rom and connect in low 16kB extra ram pages ?

Yes

I can design this interface for russian ZX clones (based on one CPLD + SRAM + battery)

At the present stage of development of the exUSSR computers, cache memory is no longer needed. Nothing new build is not necessary, sufficient and western designs. Who has the need, he repeats them.