Qualified 8/16bits computers & consoles. Only retail hardware with no extras that not were in the original hardware.
Computer examples would be: ZX Spectrum, MSX, XT-286 (EGA), CPC, BBC Micro, Apple II, A500…
Console examples would be: SNES (no extra chips), Genesis, SMS, GB/C, NES, Turbografx, GX4000, VCS, 7800.
Exceptions: NES/GB – any mapper supported by krikzz flash cards are allowed, see next section.