Полигон-2

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При обращении к дисководу лампочка горит, диск крутится, головка (если ее руками сдвинуть с 0-вой дорожки) возвращается на старт. А потом система говорит, что диска нет

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The Motor Enable signal (one of the ones on the "twist" of the cable) is not inverted, so it spins the drive up when a read from the floppy is given. The stepper moter doesn't move though because that is one of the inverted signals.

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Буду дальше с кабелем экспериментировать

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By my references they seem to have inverted a half-dozen control signals too, but left them in the same relative position on the connector. Modifying the Sony board with 3 circuit trace cuts and 3 jumpers to account for the power connections at least allows the clone to power up. The Motor Enable signal (one of the ones on the "twist" of the cable) is not inverted, so it spins the drive up when a read from the floppy is given. The stepper moter doesn't move though because that is one of the inverted signals.
I am going to see which buffer chip is used to invert the signals between the Adaptec board and the IBM planars. There is probably a riser with the correct buffer chip(s) I can assemble to do the task with a little work.

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Спасибо, попробую

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