Transformer Read Only Storage (TROS) module

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  • Description
Date Introduced
1964 ca.
Photographer
Richards, Mark
Dimensions
overall: 2 3/4 in x 15 1/4 in x 2 in
Manufacturer
International Business Machines Corporation (IBM)
Copyright Owner
© Mark Richards
Location
US
Keywords
transformer; mechanical
Object ID
102673850
Memory Type
Inductive strips

Each bit of this read-only memory for microcode is a little magnetic transformer. Punches in the mylar strips control whether current flows through the transformer or around it, representing a zero or a one.