Question About Page Mode Addressing And DRAMS

[Glas]

Does anybody know if SDRAMs use page mode type of addressing? Also, links to sites (or text books) discussing page mode memory addressing would be greatly appreciated. Thanks in advance for any information.

[Randy_tx]

I used to buy Hamburger Helper.......I get the impression Glas wants Homework Helper......hmmmm......here is a good site Glas: http://www.google.com/
type in something that will point it toward your desired result http://www.PCGuide.com/ubb/biggrin.gif

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Will XP save Me ?

[Glas]

Randy, thanks for the response. I did search at google prior to posting the question. From the information I got from the sites google pointed me to, there is no real discussion if INTERNALLY, SDRAM still does page mode addressing (just like EDO and FPM). Most books and sites mention that SDRAM is synchronous but there is no explanation how SDRAM asserts the row and column address signals inside the SDRAM chip. Hence the post.

[bunk]

Have never seen it actually stated that sdram uses paging mode but I think it is safe to assume it does. RAM gets to a memory address by going to the correct row in the matrix then it goes across the row to the correct column. Original ram would have to send a row address and a column address for each bit.

Fast Page Mode also called DRAM tried to cut memory access time by assuming that the 2nd 3rd and 4th bits needed would all be on the same row as the first bit. This saves time over restarting the row access for every bit. The name "Fast page mode" came from the ability to read the 2nd,3rd and 4th bit with out resetting the row access.

Extended Data Out works the same as FPM except it improved the way sequential columns reads are accessed.

Burst Extended Data Out is EDO ram with turbo charged sequential column reads.

So these 3 RAM types use variations of page mode addressing, or in other words can access 4 columns of data with out resetting the row.

SDRAM is basically BEDO RAM but it is synchronized with the system clock.

So I assume SDRAM uses a form of page mode also.

[Paleo Pete]

System Memory (http://www.pcguide.com/ref/ram/index.htm) might help, but I didn't fnd anything that specifically answers your question. Good info though...

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