Re: AGP question -> DIMM - Chipset compatibility

["Bryan J. Smith" <b.j.smith@ieee.org>]

On Tue, 2005-03-29 at 16:35 -0600, NZG wrote:
> No, not utterly false, we just live in two different worlds.

You're assuming I didn't spend 20 months of my career designing 8 and
32-bit microcontrollers with SRAM and DRAM logic.  ;->

And I've always worked with embedded designs as well.
Largely x86, 68k and PowerPC in the aerospace industry.

> I'm an embedded engineer, and the processors I work with don't always conform 
> to the same set of rules.

But memory controllers do.
The problem is "end consumers" and "PC techs" don't understand stuff.

> The last 3 processors I have designed with are:
> The Freescale MCF5282 Microprocessor
> The AMD SC520 Microcontroller
> The (now AMD formerly National) Geode GX1 processor with 5530 chipset
> The first two are microcontrollers, and have their DRAM (yes DRAM not SRAM) 
> controllers built into the IC. No options there.
> The GX1 is a pentium MMX base that has only one compatible chipset, the 5530, 
> and it doesn't matter anyway because the Memory controller is actually 
> located on the processor itself, not the chipset. This processor has a 64 bit 
> wide memory data bus which can be connected directly to a DIMM.(Although we 
> typically use SODIMM's in our designs)

You're directly gluing your memory.
That's much easier to accommodate.

> Very true, admittatly I am not as up to speed on this aspect of it, but am 
> learning quickly as my family keeps asking me to build PC's. (from barebones 
> kits)

The problem is that far too much info out there is _dead_wrong_.
I regularly hit AMD, Intel, nVidia and other engineering sheets.


-- 
Bryan J. Smith                                  b.j.smith@ieee.org 
---------------------------------------------------------------- 
Community software is all about choice, choice of technology.
Unfortunately, too many Linux advocates port over the so-called
"choice" from the commercial software world, brand name marketing.
The result is false assumptions, failure to focus on the real
technical similarities, but loyalty to blind vendor alignments.



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