G - Physics – 06 – F
Patent
G - Physics
06
F
352/21, 354/237
G06F 3/06 (2006.01) G06F 13/40 (2006.01) H05K 1/14 (2006.01)
Patent
CA 1323693
-17- ABSTRACT OF THE DISCLOSURE EASILY INSTALLABLE AND EASILY EXPANDABLE ELECTROMECHANICAL MEMORY ASSEMBLY An easily installable and easily expandable electromechanical memory assembly for a data processing system includes: a frame having a backplane, a plurality of printed circuit board connectors on the backplane, and conductors on the backplane which interconnect the connectors; a controller on a printed circuit board which is plugged into one of the connectors and consists essenti- ally of logic circuitry for generating and receiving control signals on the backplane conductors; and multiple data storage units; each unit being mounted on a separate printed circuit board, plugged into a separate connector, and consisting essentially of a mechanical drive mechanism which reads data by physically moving a data storage medium past a data sensor in direct response to the control sig- nals from the controller on the backplane conductors. Each data storage unit has switches for assigning an address to the drive and has terminals for receiving signals from the backplane conductors which select the drive based on the state of the switches and received signals. These switches are set to assign the same address to each drive. Signals on the backplane conductors which are transmitted from the controller in a daisy-chained fashion to all of the drives are also returned via the backplane conductors to the con- troller, and are there terminated.
538023
Balogh Edward Jr.
Faultersack David D.
Peter Jack
Roddy Stephen Patrick
Thune Eric Bruce
R. William Wray & Associates
Unisys Corporation
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