3787813 is referenced by 36 patents and cites 2 patents.

A data processing device, for use in a time-sharing computer system, comprises a central processing unit and a storage unit, the information in the storage unit being arranged in segments and the central processing unit includes a plurality of capability registers each arranged to store descriptor information indicative of the base and limit addresses of an information segment. One of the capability registers is arranged to hold information defining the base and limit addresses of an information segment which contains a segment pointer table, particular to the program currently being executed by the central processing unit and a further one of the registers is arranged to hold information defining the base and limit addresses of an information segment which contains a master capability table having an entry for each information segment in the storage unit composed of information defining the base and limit addresses of a segment. The segment pointer table comprises a list of data words which are used as pointers to define different entries in the master segment table.

Title
Data processing devices using capability registers
Application Number
05/146,334
Publication Number
3787813
Application Date
May 24, 1971
Publication Date
January 22, 1974
Inventor
Cosserat David Cockburn
Cotton John Michael
Cole Alun John
Agent
Blum Moscovitz Friedman & Kaplan
Assignee
Plessey Handel Und Investments
IPC
G06f 09/20
G06F 09/318
G06F 12/02
G06F 12/14
G06F 11/08
G06F 09/46
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