RE: [parisc-linux] Which Memory to use on a 715/80?

["\"Beerse, Corné\"" <c.beerse@torex-hiscom.nl>]

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> -----Original Message-----
> From: Harri Haataja [mailto:harri.haataja@smilehouse.com]
> 
> On Thu, Oct 10, 2002 at 05:34:47PM +0200, "Beerse, Corné" wrote:
> > > -----Original Message-----
> > > From: Grant Grundler [mailto:grundler@dsl2.external.hp.com]
> > > Derek Engelhaupt wrote:
> > > > Well, don't think any other manufacturer made memory for the 715
> > > > series.  I have looked at Dataram and others, but they only seem
> > > > to have memory for the D,K,N,L, and A class servers.
> > > I thought Kingston *did* (maybe no more).
> > I recal by head (and might be wrong) to have used pc-based memory
> > modules in a 712/80. There was something with parity (it needs it or
> > it hates it, don't know).
> 
> You usually hear that HP uses similiar form but completely different
> ram. But that's mostly on 715/735/800, maybe 712 was different. That
> would be a pleasant surprise.
> Mostly you always want parity. I would doubt anything explicitly
> demanding no parity.

Harri is right here, I was mixing SunSparc and HP-PARisk architectures. The
712 memory does NOT fit (without a hamer).

> 
> > Try what the bootloader says if you fit it with pc-based memory
> > modules, that have the same physical lay-out. (edo-ram is a 
> term that
> > comes to mind, try it or it's predecessor).
> 
> EDO AFAIK never occurs together with ECC so that's the word to avoid
> when looking for ram for older workstations ad servers.
> 36-bit FPM True-parity ECC SIMMs are what work in, for example, DEC
> Alpha AXPpci, Multia, SGI Indy, Indigo², matching Challenges, 
> IBM RS6000
> 7006 and other machines of the era and most(?) pc's. No kind 
> of EDO ram
> works.
> 
> > I might be totaly wrong here, in those days (a former job) 
> I was using
> > both SunSparc stations and HP 712 machines.
> 
> Sparcstations mostly use weird rams like JEDEC DIMM's apart from the
> very old ones that use 36-pin simm's that seem regular.

Sun Sparc ELC and SunSparcClassic (and similar Sparc 4C architecture?) can
use the same memory modules as 486-PC's. Those are NOT edo ram as in
pentium-pc's, however they do fit... It might not be what Sun tells, it is
wat is currently running at home...

> 
> 
> This is what I remember. No guarantees either.

I've tried EDO ram in a SParc Classic but it does not show up. After a short
test (15 minutes power on and try to use it) I experienced no damage on both
processorboard or memory. Then, again: no guarantees...

> 
> -- 
> I used to herd dairy cows. Now I herd lusers. Apart from the 
> isolation,
> I think I preferred the cows. They were better conversation, easier to
> milk, and if they annoyed me enough, I could shoot them and eat them.
> 		-- Rodger Donaldson 

Now I know where the name "tucows" comes from ;-)



CBee

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