The Mikro-Plus was an add-on for the ZX Spectrum computer. While this computer was limited to 48KB of usable RAM, the Mikro-Plus let it load 64KB programs by storing 16KB as a shadow ROM in the add-on itself, and loading the remaining 48KB from cassette tape as usual. Mikro-Gen invested £130,000 in producing it.
The Mikro-Plus was an expansion for the ZX Spectrum computer that allowed it to run programs with more memory than its original 48KB limit. It achieved this by storing a portion of the program's data in a shadow ROM within the add-on itself and loading the rest from cassette tape. The company Mikro-Gen invested £130,000 in developing it.