Still contains inside page markers, slips of code printouts and hand made notes from the 1980s,

4 vintage ZX Spectrum books focusing on machine code programming. These books are likely to contain valuable information and instructions for programming the ZX Spectrum computer using Z80 machine code language.

With a vintage quality, these books would appeal to collectors or enthusiasts of vintage computing technology, offering a glimpse into the Z80 programming techniques and practices of the time.