公开(公告)号：JPH08195089A

公开(公告)日：1996-07-30

申请号：JP16953095

申请日：1995-07-05

Applicant: ADVANCED MICRO DEVICES INC

Inventor： MAAKU SHIRA

IPC: G11C15/04 ,  G06F12/08 ,  G06F12/12

Abstract: PROBLEM TO BE SOLVED: To make it possible to simultaneously detect a plurality of conditions by sequentially outputting separate associativity, index to a specific Memory cell by the priority order of respective tasks. SOLUTION: An encoder 130 identifies the states of memory cells by each 8 of a group by the state bits of the respective cells. When any of inputs 134 to first block 132 exhibits specific memory cell condition such as data alteration of a memory cell storage, the block 132 outputs an altering signal 136a to a first level 2 function block 138. Further, an altering signal 140 is output to a level 3 function block 142. The blocks 142, 138 indicate that the high block of next order has alteration by signals 144, 137. Thus, the encoder 130 detects the memory cell state, and when the specific state such as alteration is detected simultaneously during observation of 8 memory cells, priority order can be set to the results.

公开(公告)号：JPH08171513A

公开(公告)日：1996-07-02

申请号：JP16952995

申请日：1995-07-05

Applicant: ADVANCED MICRO DEVICES INC

Inventor： MAAKU SHIRA

IPC: G06F12/08

Abstract: PROBLEM TO BE SOLVED: To provide a device and a method for deciding the address of the change line in a cache memory, taking-out a tag, data and a corresponding associativity and executing a copy-back routine to an external memory against the change line. SOLUTION: The cache memory adds attribute array 10b, tag array and data array. The device adds a priority order look-ahead encoder logical circuit 56 for Simultaneously checking the state of the respective lines of attribute array 10b and judging whether or not more than one change line exists. The circuit 56 gives priority order to the change lines at the time of the plural change lines for the copy-back routine writing the change lines in the external memory. The device generates the address of the external memory corresponding to the respective change lines and finally takes-out data corresponding to the respective change lines for copy-back so as to hold it.