ROM files structure

[VELESOFT]

What is structure of rom files bigger than 32kB ?

Exist 64kB/128kB and 256kB roms for ZX emulators.

32kB roms contain 128ROM + 48ROM.
64kB roms contain also this roms + trdos + ???. Layout of this bigger roms is same for all emulators ? Different ZX clones use same rom layout ?
Any info about bigger roms than 64kB ?

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