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Typical Timing Sequence
Index Pulses
Head Load
Write Gate
Access 0/1
Access 1/2
Access 2/3
Access 3/0
I·
166.6 ms
, I
Nominal
CI
I
80
ms
I i -
9-----
1
•
I
'
I ,
~
______________
~.D~~I_JI
. .
! . . . .
W ...
"~---------------
~
I
.1 . .
1
. . . . . .
1
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Lines
Energized
Leadscrew Rotation - .
1~:'!~!~~9~'
I
I
Head Location
I
,
I
~"':"\-J-------
Track -
0
2
I
3
I
4
I 5
\ 6
1
Access 0/1
Access 1/2
Access 2/3
AccAss 3/0
~
X
X
X
X
X
X
X
X
74
75
76
X
X
X
X
X
X
X
X
X
X
L - - - - - L _ - - L . ___
~
33FD Diskette Drive
3-7
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