IBM 2030 Manual Of Instruction page 160

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T
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Figure 2-78.
2-80
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2048 Positions
+
128 Positions
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2048 Positions
+
128 Positions
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2048 Positions
+
128 Positions
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2048 Positions
+
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128 Positions
TOP
8 Auxiliary Storage Lines
4 for CPU Local Storage
4 for Multiplexor Storage
2048 Positions
+
128 Positions
2048 Positions
+
128 Positions
2048 Positions
+
128 Positions
2048 Positions
+
128 Posi tions
Eight additional Y lines intersect with 128 X lines to produce 1024 additional bit positions per plane.
Auxiliary Storage Core Plane Windings