Post #3966513
2026-07-20 17:39 UTC
i have no idea what kind of acceleration curve to use for a floppy spindle motor, and I don't have a tachometer handy.
but we basically have a built-in tachometer, the index sensor.
I can stick a logic analyzer on the /INDEX signal on the floppy cable and turn the motor on, and we should be able to work out the acceleration profile from the relative positions of each index pulse until they stop getting closer together.
Replies (1)
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@gloriouscow@oldbytes.space 2026-07-20 17:45
another wrinkle occurs with sound. I need to trigger a recorded 'step' sound when the drive steps. but the sound of stepping once is different from the sound of stepping over multiple tracks. And in fact, stepping inwards sounds different than stepping outwards. So I'll probably need to handle all the sound triggers in the FDC, instead of the drive. There may be a way to actually simulate the step sounds instead of playing samples, but a) i hate sound b) i don't think i'm smart enough