För mig var den absolut största behållningen här utställningen av en rekonstruktion av Z1 - den första programmerbara datorn någonsin. Originalet förstördes under kriget, men Konrad Suze deltog i arbetet med rekonstruktionen 1989 (han dog 1995) av det exemplar som nu visas. Jag spenderade två timmar här (beväpnad med en massa utskrifter av ritningar och dokument som förklarade hur den fungerade.)
Z1 (computer) - Wikipedia
"The Z1 contained almost all the parts of a modern computer, i.e. control unit, memory, micro sequences, floating-point logic and input-output devices. The Z1 was freely programmable via punched tape and a punched tape reader.[4] There was a clear separation between the punched tape reader, the control unit for supervising the whole machine and the execution of the instructions, the arithmetic unit, and the input and output devices. The input tape unit read perforations in 35-millimeter film.
The Z1 was a 22-bit floating point value adder and subtracter, with some control logic to make it capable of more complex operations such as multiplication (by repeated additions) and division (by repeated subtractions). The Z1's instruction set had nine instructions and it took between one and twenty cycles per instruction.
The Z1 had a 64-word floating point memory, where each word of memory could be read from – and written to – by the control unit. The mechanical memory units were unique in their design and were patented by Konrad Zuse in 1936. The machine was only capable of executing instructions while reading from the punched tape reader, so the program itself was not loaded in its entirety into internal memory in advance."