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3.4.2
Track 00 (TKO)
When the read/write heads are on the zero (0) track on side
0 of the flexible disk, this signal goes Low.
3.4.3
Dual-Sided (TSD)
The TSD signal goes High if the flexible disk is single
sided;
the signal goes Low if the flexible disk is dual
sided.
If there
High.
3.4.4
Ready (RDY)
The Ready signal goes Low when the Model FD1165 is ready for
use.
The signal
exist.
•
Dc power is supplied.
•
A flexible disk is inserted and the door is closed.
•
The flexible disk has reached 70% of its prescribed
rotational speed and four IDX pulses have been gen
erated .
•
The flexible disk is single-sided and side 0 is de
tected .
3.4.5
File Unsafe (FUS)
The File Unsafe
occurs.
The low FUS disables write operations and is reset
to High by a File Unsafe Reset signal.
for any of the following conditions.
•
The Write Data signal does not appear within 18 ys
after the Write Gate signal becomes active. •
•
The Write Gate signal is active but the Head Load
signal is not.
•
The Write Gate signal is active but the Ready signal
is not.
•
The Step signal is active at the same time that the
Write gate signal is active.
is no flexible disk inserted, TSD stays
indicates
that
signal
goes Low when an alarm condition
3-7
the following conditions
The line goes Low
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