公开(公告)号：JPH03135642A

公开(公告)日：1991-06-10

申请号：JP17609390

申请日：1990-07-03

Applicant: TANDEM COMPUTERS INC

Inventor： ROBAATO DABURIYUU HOOSUTO ,  AAJIEI KEI SHIYAA ,  AI KOO YAMAMOTO

IPC: G06F12/08 ,  G06F12/02 ,  G06F12/10

Abstract: PURPOSE: To perform high-speed memory read and write by providing a comparator for judging whether or not a memory location indicated by an address request is included inside the plural memory locations. CONSTITUTION: In order to process a new address request 001110, row bits inside the address request 8 and the contents of virtual/physical (CAMtag) 7 are compared. In this case, the row bits inside the address request 8 are 001 and the contents of the CAMtag 7 are 101 on the other hand. Thus, since the comparator 11 indicates that a CAM error is present, it means that the newly arrived address request 8 is for a row different from the row asserted at present. Then, when the comparator 11 indicates an error, registers 6 and 7 are updated. Thus, cache fill time is reduced and a valid write band width is enlarged.