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3.2.3
Interface Lines
The interface lines for the FD1165 are shown in Figure 3-2.
The
even-numbered
The odd-numbered
lines are named for the input or output signals that they
carry.
* SIGNALS USED ONLY WHEN VFO OPTION IS INSTALLED
3.3 INPUT SIGNALS
This section describes the input signals that are carried
on the interface lines for the Model FD1165.
3.3.1
Drive Select 1 Through 4 (DSX1 to 4)
These signals select one disk drive in the system for input/
output
(I/O) .
Low, the corresponding disk drive is selected.
2.7 for the identification selection procedure.
lines
(2 through 50)
lines
(1 through
Figure 3-2
Interface Lines
When one of the signals
3-3
are signal
49)
are
grounds.
(DSX1 to DSX4)
See Section
lines.
The
is
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