ACT apricot - Page 111

FLOPPY DISK INTERFACE
Register. If the Verify Flag is set, verification of the track
position is carried out.
Step Command. Issuing a Step command moves the head
one track location in the direction specified by the previous
command. If the Track Update Flag is set, the Track
Register is updated following the issue of the Step pulse. If
the Verify Flag is set, verification of the track position is
carried out, after a delay
determined by the stepping rate
bits (i.e. A delay of 15 ms. for the standard disk drives).
Step-in Command. Issuing the Step-in command moves the
head one track location away from Track O. If the Track
Update Flag is set, the Track Register is incremented
following the issue of the Step pulse. If the Verify Flag is set,
verification of
the track position is carried out, after a delay
determined by the stepping rate bits.
Step-out. Issuing the Step-out command moves the head
one track location towards Track O. If the Track Update Flag
is set,
the Track Register is decremented following the issue
of the Step pulse. The Verify Flag functions in the same
manner as described above for the Step and Step-in
commands.