2EU和BIU的操作关系和指令流水 )指令流水 ELASPED TIME CPU: EXECU WRI EXECUTE IRE EXECUTE BUS: BUSY s BUS BUSY BUSY ECUTE EXECI EXECUT MICROPRI BIu: EFETCH rc FET WRITE EFETCH BU BUSY NSTRUCTION STREAM MM EXECUSTERUNTYON 邮e8FH AND EXECUTE 4th INSTRUCTION 菱BH2、EU和BIU的操作关系和指令流水 2）指令流水