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R.99
150
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DRSEL
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5
INDEX
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RADIAL INDEX
STATUS TO
USER
CONTROLLER
PROGRAM SHUNT PINS 6-10 ARE OPENED
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Figure 1-9
Radial Index Installation
1.19.9
Index Alternate Output Pad
(I)
The internal index pulse is gated with drive select to give a low true signal at Pad
I.
This option should
be left connected for the controller to receive the index pulse. See Radial Index for other uses of this
line.
The Index Alternate Output Pad option is factory installed.
1.19.10
In Use Alternate Output Pad (D)
This line may be used to latch a lever lock solenoid, which is an optional feature. A low (true) command
is sent by the controllerto Pin 16 of interface connector P13. Then this signal is used with drive select
to latch the locking solenoid by pulsing drive select with IN USE low. The solenoid is unlatched when
drive select is pulsed and
IN USE
is high.
To implement this option, locate option pads D and DL. Install jumpers at these locations.
1.19.11
Diskette Lever Lock Latch Option (DL)
This option is used in conjunction with in use, alternate output pad.
To implement this option, locate option pads D and DL.lnstall jumpers at these locations (see Section
1.18).
1.19.12
Disk Change (DC)
This output is used to indicate to the controller 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 stays low
until the trailing edge of the next drive select.
1.19.13 Two-Sided Diskette Installed (2S)
When a two-sided diskette is installed, internal circuitry gates this signal with drive select, and sends
a low (true) signal to the controller, which means that a double-sided diskette is installed (index hole
two is present).
The Two-Sided Diskette Installed option is factory installed.
1-20
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