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A.1 LOCAL STORAGE CARD AND STORAGE
PROTECTION CARD
A.1.1 FUNCTIONAL DESCRIPI'ION
A 64 X 10 self-contained functional
three-dimensional storage- array card
(including word drivers, storage elements,
bit drivers, sense amplifiers and a voltage
regul~tor)
is used for local storage and
storage protection.
When the storage
protection feature is present, the two
cards (Figure A-1) can be swapped for
diagnostic purposes.
'!he inputs to the
storage unit are an
ax
by 8Y matrix.
Appendix A. Special Circuits
Two modes of operation are poosible:
1.
A write operation, or
2.
A nondestructive read operation CNDR).
The NDR operation is accomplished by
supplying a valid address Cone X- and one
Y-line selected), and sampling the output
by conditioning the sense aroplifier gate
on.
(If minimum access time is not needed,
the sense amplifier gate can be left on at
all times.)
The write operation requires a
valid address input, 10 data inputs, and a
bit driver timing pulse (timed write
instruction), all of which must be
coincident.
All signal input and output
lines are compatible with SLD/SLT circuits.
Figure A-1,. Local Storage and Storage Protection Card
2025 FEMM (7/69)
A-1
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