SOFTWARE INSTRUCTION ENDOWING APPARATUS METHOD FOR MICROPROGRAMMING SYSTEM

摘要

PURPOSE: To improve the throughput of a system by increasing or decreasing a virtual address stored in a base register during the read cycle of the preceding operand for the address designation of the next operand. CONSTITUTION: A virtual memory managing unit(VMMU) 34 translates the virtual address described in an instruction to be executed into physical address of a main storage device 50. This physical address is sent out to the main storage device 50 and a cache memory 36. A binary arithmetic logic unit(BALU) 4 receives the operand, increases or decreases the base address or an index value and stores this increased or decreased address or index value in a register file 2. A Q register 6 and a shifter 8 are operated together with the BALU 4 and perform various kinds of arithemtic operation and logical operation including binary multiplication and division under the control of RDR signal.