Watch the stepper motors cycle as the drive recalibrates on boot.
It's easier to do this if you press "Glacial" before
you play the trace.
The spiral disk protection used on Choplifter gives a neat effect.
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Legend
The circle represents the floppy disk surface, and the black bar is
the disk read/write head. The line across the disk surface doesn't
correspond to anything real; it's just to show when the disk is rotating.
The circles under the read/write head show the track currently under
the head: the thickest ones are whole-numbered tracks, thinner ones
are half-tracks, and the thinnest ones are quarter tracks. The circle
turns green when reading is occurring in the trace. The phase boxes
show the state of the head stepper magnets, where green is on and black
is off.
By John Aycock. This is part
of the research work for my forthcoming book
Retrogame Archeology: Exploring Old Computer Games.