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This is most likely a position for charging in case a rechargeable battery pack is used. Keep in mind, these are the late 70s. A automatic charging electronic would have been rather high effort for back then and especially a low end calculator like this. Kaufhof was a large German department store targeting low to average income customers and "Elite&...


3

Early 8" floppy drives using mains-powered induction motors were speed-locked to the 50/60Hz mains frequency which determined (in most cases including a reduction gearing using a belt drive) the rotational speed of the floppy disk. This used to be the easiest and most exact way to maintain constant RPMs but also manifested itself in the disk format ...


2

Well, I asked an expert. The Apple II's 3.5 inch floppy drive was/is GCR. I think I'm right in saying that the most you could put onto an Amiga disc and it work on ALL Amigas was 837K and the Apple II could store 1440K. I talked to an old friend (she wrote Jaguar XJ220 on Amiga & ST for example) and she explained the lengths she had gone to to ...


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