The ZX81 only had 1K by deafult! you had to add a memory pack for anythign more. It was the ZX Spectrum that had 16/48K depending on the version you bought (the 16K was quickly phased out)
The ZX81 only had 1K by deafult! you had to add a memory pack for anythign more. It was the ZX Spectrum that had 16/48K depending on the version you bought (the 16K was quickly phased out)