3HAC026222-003，3HAC026222-003

3HAC026222-003

 

3HAC026222-003
 
聯(lián)想存儲器用于地址聯(lián)想，有與高速存儲器相同行數(shù)和列數(shù)的存儲單元。當主存儲器某一列某一行存儲單元組調入高速存儲器同一列某一空著的存儲單元組時，與聯(lián)想存儲器對應位置的存儲單元就記錄調入的存儲單元組在主存儲器中的行號。
 
當中央處理器存取主存儲器時，硬件首先自動對存取地址的列號字段進行譯碼，以便將聯(lián)想存儲器該列的全部行號與存取主存儲器地址的行號字段進行比較：若有相同的，表明要存取的主存儲器單元已在高速存儲器中，稱為命中，硬件就將存取主存儲器的地址映射為高速存儲器的地址并執(zhí)行存取操作；若都不相同，表明該單元不在高速存儲器中，稱為脫靶，硬件將執(zhí)行存取主存儲器操作并自動將該單元所在的那一主存儲器單元組調入高速存儲器相同列中空著的存儲單元組中，同時將該組在主存儲器中的行號存入聯(lián)想存儲器對應位置的單元內。
 
當出現(xiàn)脫靶而高速存儲器對應列中沒有空的位置時，便淘汰該列中的某一組以騰出位置存放新調入的組，這稱為替換。確定替換的規(guī)則叫替換算法，常用的替換算法有:近少使用算法（LRU）、先進先出法（FIFO）和隨機法（RAND）等。替換邏輯電路就是執(zhí)行這個功能的。另外，當執(zhí)行寫主存儲器操作時，為保持主存儲器和高速存儲器內容的一致性，對命中和脫靶須分別處理。

INDUSTRIAL INDEXING MM-10-PLUS

ALLEN BRADLEY 2711-T9C9 SERIES C DISPLAY

LOT OF 2 LEEDS & NORTHRUP 080424 REV.C/G1 ANALOG OUTPUT

QUAD TECH 80188-286

RELIANCE ELECTRIC 78177-1X

TOSHIBA VT130G3U4025

VACON VACONX4C50020C AC DRIVE

ROSEMOUNT 3051CD2A02A1AS5

RELIANCE ELECTRIC 57C330C

ALLEN BRADLEY 512-BJA-25R SERIES D COMBINATION STARTER

ALLEN BRADLEY 120659 KIT PCB MAIN CONTROL
 

INDUSTRIAL INDEXING MM-10-PLUS

ALLEN BRADLEY 2711-T9C9 SERIES C DISPLAY

LOT OF 2 LEEDS & NORTHRUP 080424 REV.C/G1 ANALOG OUTPUT

QUAD TECH 80188-286

RELIANCE ELECTRIC 78177-1X

TOSHIBA VT130G3U4025

VACON VACONX4C50020C AC DRIVE

ROSEMOUNT 3051CD2A02A1AS5

RELIANCE ELECTRIC 57C330C

ALLEN BRADLEY 512-BJA-25R SERIES D COMBINATION STARTER

ALLEN BRADLEY 120659 KIT PCB MAIN CONTROL
 

INDUSTRIAL INDEXING MM-10-PLUS

ALLEN BRADLEY 2711-T9C9 SERIES C DISPLAY

LOT OF 2 LEEDS & NORTHRUP 080424 REV.C/G1 ANALOG OUTPUT

QUAD TECH 80188-286

RELIANCE ELECTRIC 78177-1X

TOSHIBA VT130G3U4025

VACON VACONX4C50020C AC DRIVE

ROSEMOUNT 3051CD2A02A1AS5

RELIANCE ELECTRIC 57C330C

ALLEN BRADLEY 512-BJA-25R SERIES D COMBINATION STARTER

ALLEN BRADLEY 120659 KIT PCB MAIN CONTROL
 

RELIANCE ELECTRIC 78177-1X

TOSHIBA VT130G3U4025

VACON VACONX4C50020C AC DRIVE

ROSEMOUNT 3051CD2A02A1AS5

RELIANCE ELECTRIC 57C330C

ALLEN BRADLEY 512-BJA-25R SERIES D COMBINATION STARTER

ALLEN BRADLEY 120659 KIT PCB MAIN CONTROL
 

LOT OF 95 FINDER 55.34.9.024.5080 RELAY

MICRO MOTION S100S138

SEALED ALLEN BRADLEY 1771-OBD SERIES C DATE CODE 12/04

SEALED ALLEN BRADLEY 1771-IBD SERIES B DATE CODE 10/04

SEALED ALLEN BRADLEY 1771-IBD SERIES B DATE CODE 5/08

RELIANCE ELECTRIC 78177-1X

TOSHIBA VT130G3U4025

VACON VACONX4C50020C AC DRIVE

ROSEMOUNT 3051CD2A02A1AS5

RELIANCE ELECTRIC 57C330C

ALLEN BRADLEY 512-BJA-25R SERIES D COMBINATION STARTER

ALLEN BRADLEY 120659 KIT PCB MAIN CONTROL
 

LOT OF 95 FINDER 55.34.9.024.5080 RELAY

MICRO MOTION S100S138

SEALED ALLEN BRADLEY 1771-OBD SERIES C DATE CODE 12/04

SEALED ALLEN BRADLEY 1771-IBD SERIES B DATE CODE 10/04

SEALED ALLEN BRADLEY 1771-IBD SERIES B DATE CODE 5/08

RELIANCE ELECTRIC 78177-1X

TOSHIBA VT130G3U4025

VACON VACONX4C50020C AC DRIVE

ROSEMOUNT 3051CD2A02A1AS5

RELIANCE ELECTRIC 57C330C

ALLEN BRADLEY 512-BJA-25R SERIES D COMBINATION STARTER

ALLEN BRADLEY 120659 KIT PCB MAIN CONTROL
 

LOT OF 95 FINDER 55.34.9.024.5080 RELAY

MICRO MOTION S100S138

SEALED ALLEN BRADLEY 1771-OBD SERIES C DATE CODE 12/04

SEALED ALLEN BRADLEY 1771-IBD SERIES B DATE CODE 10/04

SEALED ALLEN BRADLEY 1771-IBD SERIES B DATE CODE 5/08

 

 

RELIANCE ELECTRIC 78177-1X

TOSHIBA VT130G3U4025

VACON VACONX4C50020C AC DRIVE

ROSEMOUNT 3051CD2A02A1AS5

RELIANCE ELECTRIC 57C330C

ALLEN BRADLEY 512-BJA-25R SERIES D COMBINATION STARTER

ALLEN BRADLEY 120659 KIT PCB MAIN CONTROL
 

LOT OF 95 FINDER 55.34.9.024.5080 RELAY

MICRO MOTION S100S138

SEALED ALLEN BRADLEY 1771-OBD SERIES C DATE CODE 12/04

SEALED ALLEN BRADLEY 1771-IBD SERIES B DATE CODE 10/04

SEALED ALLEN BRADLEY 1771-IBD SERIES B DATE CODE 5/08