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Method and apparatus for dynamically controlling read/write operations in a peripheral subsystem

  • US 3,950,735 A
  • Filed: 01/04/1974
  • Issued: 04/13/1976
  • Est. Priority Date: 01/04/1974
  • Status: Expired due to Term
First Claim
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1. In a data processing system which includes a central processing unit for issuing commands, a peripheral subsystem comprisinga plurality of data storage devices, each for operating at a certain speed to record and reproduce data and including means responsive to an interrogation signal for producing a signal indication of the operating speed of the device,means responsive to a command issued by the central processing unit for applying an interrogation signal to a selected one of said data storage devices,data register means, and

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