Rana Systems Elite Series - Manual (Page 161)

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 . P o w e r I n t e r f a c e
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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