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ELITE SERIES USER MANUAL SPECIFICATIONS
ize the disk (side) with a particular polarity.
A logical low level will cause the (selected)
read/write head to magnetize the disk (side)
using the opposite polarity. This line is only
enabled when the Activate Writing signal is
enabled. Write Data is inactive during a read
operation A Write Data clamp is provided with-
in the drive logic to hold the Write Data line
at a logical zero whenever Activate Writing is
inactive.
Write Protect
This interface signal is provided by the drive
to give the Apple an indication when the in-
stalled diskette is write protected. The signal
is a logical low level when it is protected.
The drive will inhibit writing with a protected
diskette installed in addition to notifying the
controller card.
Write protection can be in the form of either a
diskette with a label covering the write protect
notch (physical write protection), or the front
panel write protect switch being set on the
Elite Series drives (logical write protection).
6.5. Power Interface
Both the Elite Series and Disk II drives require
only DC power for operation, which is drawn from
the Apple II computer through the controller
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