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EP0010123A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Paging control store data processing apparatus

Assignee: International Business Machines Corp
•
Filing: 1979-07-25
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Granted: —
•
Expires: 1999-07-25
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Abstract

Abstract To provide a relatively cheap and non degrading authentication test of control word modules paged into control storage in paging control store data processing apparatus, there are provided means 122 to generate a signal (or on line 23) at the decoder 120 in response to detection of a current control word effective on the decoder to cause generation of control signals to effect transfer of control words from main storage to the control store 15. logic (including 124 125 157) responsive to such signal but otherwise independent of the decoder, to generate an independent group of control signals effective to exercise a predetermined register (in 90), the ALU 40 and appropriate gates (29 36 92 93) and paths to progressively accummulate, in the predetermined register, a check word relative to the transferred control words, while such words are being transferred to the control store to test the accuracy of such transfer.

Inventors

  • 👤 Neil Clair Berglund
  • 👤 William George Kempke

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 21:15
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F11/1008; G06F11/1004; G06F11/1076; G06F11/28

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 131 words
Paging control store data processing apparatus including means 122 to generate a signal (OL on line 123) at the decoder 120 in response to detection of a current control word effective on the decoder to cause generation of control signals to effect transfer of control words from main storage 10 to the control store 15, logic (including 124, 125, 157) responsive to such signal but otherwise independent of the decoder, to generate an independent group of control signals effective to exercise a predetermined register (in 90), the ALU 40 and appropriate gates (29 36 92 93) and paths to progressively accummulate, in the predetermined register, a check word relative to the transferred control words, while such words are being transferred to the control store to test the accuracy of such transfer.
Claim 2
Dependent Claim 131 words
Paging control store data processing apparatus including means 122 to generate a signal (OL on line 123) at the decoder 120 in response to detection of a current control word effective on the decoder to cause generation of control signals to effect transfer of control words from main storage 10 to the control store 15, logic (including 124, 125, 157) responsive to such signal but otherwise independent of the decoder, to generate an independent group of control signals effective to exercise a predetermined register (in 90), the ALU 40 and appropriate gates (29 36 92 93) and paths to progressively accummulate, in the predetermined register, a check word relative to the transferred control words, while such words are being transferred to the control store to test the accuracy of such transfer.
Claim 3
Dependent Claim 39 words
Apparatus as claimed in claim 1 including means (43 44) to detect the completion of transfer of a set of control words from main storage to control storage and, thereupon, to effect a test of the accummulated check word.
Claim 4
Dependent Claim 43 words
Apparatus as claimed in claim 2 wherein the detection means (43, 44), on detection of completion of transfer, forces a specific address into the control store (at CSAR 17) to access a test control word not forming part of the control words transferred.

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