§
Luxuse
Patent Intelligence
Sign In
Patent US3906452A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3906452A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for connecting and disconnecting system units in a modularly constructed data processing system

Assignee: Siemens AG
•
Filing: 1972-04-03
•
Granted: 1975-09-16
•
Expires: 1992-04-03
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A method is described for establishing and disconnecting connections between the various system units of a modularlyconstructed program controlled data processing system. The system units may be any one of the various processing units, such as line connection units, or storage units. Those system units which are processing units communicate cyclically with each other over the system units which are central storage units. This communication takes place in such a manner that the cycle allocation occurs over a central control unit or computer on the basis of cycle demands emananting from a system unit. In order to establish or disengage connections between individual system units for both directions of operation, two signals are transmitted in each case. That is, for each direction of operation one signal is formed as a static signal, and the other signal is formed as a dynamic signal. When the central storage units are in a ready-for-service condition, they make available a static signal. In order to establish the connection only those system units which are processing units and are demanding a connection with a storage unit thereafter transmit a static signal and a dynamic signal. The latter static and dynamic signals are evaluated in the storage units concerned, and are acknowledged by the return of the dynamic signal. Only when this condition has occurred are the cycle demands from the system units desiring connection operated on. For this disengagement of a connection the static signal issuing from the system unit desiring the disengagement is disconnected.

Inventors

  • 👤 Hans-Ulrich Moder

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 16:19
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/1658; G06F11/1666; G06F11/20; G06F11/202; G06F11/2035; G06F11/2043; H; H04; H04L; H04L12/00; H04L12/50; H04L12/52; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54541; H04Q3/54558

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 206 words
In a program controlled data processing system of modular construction, which system contains processing units and central storage units, said processing units and said central storage units communicating in a cylical manner, a method for switching on and switching off connections between processing units and central storage units, comprising the steps of: initiating a switching on condition for establishing a connection between at least a said processing unit and a said central storage unit, generating and transmitting from a said central storage unit a static signal only if that central storage unit is in a ready for service condition, evaluating said transmitted static signal in said processing units which are in a switched on condition, generating and transmitting from said processing units in a switched on condition, responsive to said evaluating step, a static and dynamic signal to said central storage units, evaluating said static and dynamic signals in said central storage units and transmitting, responsive thereto, a dynamic signal to said processing units enabLing the switching on of connections and evaluating the static signals initiating the switching off condition by determining the absence of said static signals in said processing units and said central storage units and, responsive thereto, causing the disconnection of existing connections.
Claim 2
Dependent Claim 206 words
In a program controlled data processing system of modular construction, which system contains processing units and central storage units, said processing units and said central storage units communicating in a cylical manner, a method for switching on and switching off connections between processing units and central storage units, comprising the steps of: initiating a switching on condition for establishing a connection between at least a said processing unit and a said central storage unit, generating and transmitting from a said central storage unit a static signal only if that central storage unit is in a ready for service condition, evaluating said transmitted static signal in said processing units which are in a switched on condition, generating and transmitting from said processing units in a switched on condition, responsive to said evaluating step, a static and dynamic signal to said central storage units, evaluating said static and dynamic signals in said central storage units and transmitting, responsive thereto, a dynamic signal to said processing units enabLing the switching on of connections and evaluating the static signals initiating the switching off condition by determining the absence of said static signals in said processing units and said central storage units and, responsive thereto, causing the disconnection of existing connections.
Claim 3
Dependent Claim 51 words
The method defined in claim 1 wherein said static and dynamic signals issuing from said processing units which are in a switched on condition are transmitted concurrently to all of said storage units which are in the ready for service condition and are transmitting said static signal to the processing units.
Claim 4
Dependent Claim 63 words
The method defined in claim 2 comprising the further steps of: monitoring the establishment of a connection between said processing units and said storage units by constantly comparing the state of seizures of said storage units, and disengaging a connection upon a determination that the connection is established only with one of said storage units prior to the return of said acknowledging signal.
Claim 5
Dependent Claim 101 words
The method defined in claim 1 wherein an additional static signal is used to reconnect a storage unit which has been disconnected from the system because of a defect or the like, comprising the further steps of: transmitting said additional static signal to said processing units from said disconnected storage unit, producing signals from the one of said storage units connected to replace said storage units to be reconnected, said signals indicating the correlation between the existing connections from the processing units to both of said storage units and establishing a reconnection condition during the existence of said additional static signal.
Claim 6
Dependent Claim 42 words
The method defined in claim 4 wherein during said reconnecting condition, said processing units communicate with said replacing storage unit for accepting data and programs and wherein said processing units communicate with said storage unit to be reconnected for changing storage contents.

References Cited (Backward Citations)

US3200380A Cited
US3274561A Cited
US3411139A Cited
US3419852A Cited
US3505648A Cited
US3566363A Cited
US3641505A Cited
US3680052A Cited
US3671942A Cited
US3689897A Cited
US3716843A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-15 1979-03-17 1979-09-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-15 1983-03-17 1983-09-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-15 1987-03-17 1987-09-16 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag