Data handling system with relocation capability comprising operand registers adapted therefor

Claim 1

A data handling system with relocation capability including a plurality of base registers for storing base addresses, a plurality of operand registers, and a main memory having a plurality of storage addresses, a subgroup of said storage addresses being identified by one base address and a plurality of relative addresses contained in one of said base registers and a group of instructions for the data handling system, respectively, each of said operand registers and said storage addresses in said maiN memroy including means for storing either an address datum and a datum other than the address data, wherein the improvement comprises a first, a second, and a third storage area included in each of said operand registers and said storage addresses in said main memory, said first storage area comprising means for storing first and second information for identifying whether the operand register or storage address has an address datum or a datum other than an address data stored therein, said second storge area comprising means for storing a code specifying one of said base registers that contains a base address for address datum stored in said operand register or main memory address, said third storage area of the operand register comprising means for storing a resulting address given by the sum of the base address and a relative address when the operand register contains an address datum, said third area of said storage address being, when the datum stored in the main memory at the address is an address datum, a relative address therefor.