| 摘要 |
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. |
