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Home » Dictionary » Memory

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numeric

EDO
Author: Gabriel Torres Last Updated: October 15, 2005
Category: Memory

Extended Data Out

Type of RAM memory chips used on the PC from the first Pentium systems until SDRAM memory became widely available. It replaced the FPM technology.

Its main feature is the capability of reading sequential data faster, just like FPM, but faster. For example, assuming four data store consecutively (four data stored in four consecutive addresses), the first data can delay several clock cycles to be read (seven cycles, for example), but the following data can be read always using two clock cycles (FPM memories used three clock cycles). Because of that this kind of memory is said to have an x-2-2-2 access cycle (FPM cycle is x-3-3-3-3).

This kind of memory is found basically on SIMM-72 memory modules and a small number of PCs came with EDO memories soldered on DIMM memory modules.

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