| 摘要 |
PURPOSE:To improve the executing efficiency of an instruction by providing a 2nd address conversion buffer that can be retrieved by the values of the base register number and the index register number which are designated by the instruction. CONSTITUTION:The 2nd address conversion buffer 8 defines the coupled value of a base address 104 and the index value 105 which are designated by the instructions respectively as an address and can freely store a physical address corresponding to said address as well as a valid bit showing whether the stored physical address is valid or not. Then the operand data 111 can be taken out in a 2nd cycle for execution of instructions which is faster than the conventional cycle by one cycle as long as a physical page address 205 of the data 111 is stored in the buffer 8 when the address 104 and the value 105 are supplied by each instruction. Thus the executing efficiency of an instruction is improved. |
