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READY AND TRUE READY (R AND TR)
DISK CHANGE (DC)
When the R jumper is installed, the Ready
signal is available at the interface. When the
TR jumper is installed, the True Ready signal
is available at the interface.
The R jumper is standard, while the TR
jumper is optional. These two lines are inde-
pendent functions, and may be used separately
or together.
R
X
TR
X
READY OR TRUE READY
Ready signal via Jl-22.
True Ready signal via Jl-8.
This output is used to indicate to the con-
troller that a disk change has been made. The
internal signal is gated with Drive Select.
When the lever is opened, the Disk Change
line goes low (true), and remains low until the
trailing edge of the next Drive Select.
DC
DISK CHANGE
Disk Change signal not available.
X
Disk Change signal available via
Jl-12.
TWO-SIDED DISKETTE INSTALLED (2S)
NOTE
When using the True Ready
option, Motor Control 3 may not
be used.
When a two-sided diskette is installed,
internal circuitry gates this signal with Drive
Select.
It
sends a low (true) signal to the
controller, indicating that a double-sided
diskette is installed (index hole two is
present). This option is factory installed.
LEVER LOCK OPTIONS (D, DL, LL, NL)
The lever lock solenoid, an optional feature,
can be controlled by the In Use interface line
Jl-16.
2S
X
TWO-SIDED DISKETTE
Two-sided diskette signal not
available.
Two-sided diskette signal available
via J1-10.
WRITE PROTECT (WP AND NP)
This WP option is used to lock out the Write
Gate when a write protected diskette is
installed.
It
is factory installed.
The NP option allows the controller to write
on any diskette, whether or not it is write
protected.
It
does not stop the Write Protect
signal from being sent on the interface line.
This option is implemented by removing WP,
and installing NP.
D
DL
LL
NL
LEVER LOCK
SOLENOID
Latched with Drive
Select.
X
X
X
Latched by In Use
via Jl-16, true (low).
Active energizes
solenoid.
X
X
X
Latched by In Use
via Jl-16. Active low,
in conj unction with
Drive Select, latches
the solenoid. The
solenoid remains
latched until In Use
is false (high) on the
leading edge of Drive
Select.
3-13
WP
X
NP
X
WRITE PROTECT
Disables Write Protect, for
write protected diskette.
Allows writing on any
diskette.
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