SYSTEM FOR ENABLING EXECUTION OF TWO WORD INSTRUCTION IN ONE CYCLE AND METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To increase a memory base capable of addressing by providing a second address bus for supplying all the address values of a two-word instruction to a linearized program memory in one cycle. ;SOLUTION: A first address bus 14 is connected to the linearized program memory 12 and is used for sending the address of a fetched instruction to the linearized program memory 12. A pointer 16 is connected to the first address bus 14. The second address bus 20 is provided with a first end part connected to the output of the linearized program memory 12 and the second end part of the second address bus 20 is connected to the first address bus 14. The second address bus 20 is used for arranging the address of the operand of the second word (word fetched during the execution of a first word) of the two-word instruction on the first address bus 14 after the address of the operand of the first word of the two-word instruction is arranged on the first address bus 14.;COPYRIGHT: (C)1999,JPO