[rescue] sun ultra 5s - trade for memory??

Phil Stracchino phil.stracchino at speakeasy.net
Thu Mar 3 12:04:40 CST 2005

Jochen Kunz wrote:
> On Thu, 03 Mar 2005 11:16:57 -0000
> "Rox" <rox at sunmuseum.org> wrote:
>>If you are prepared to take a needle file and enlarge the keyway slot
>>to make it fit,
> Why not just slam the DIMMs into the machine with a sledge hammer?
> Sorry, I don't wane be offensive. But your sugestion is quite rude.
> The key slots on the DIMMs are there to encode different DIMM types.
> E.g. supply voltage, registered / buffered vs. unregistered, RAM type
> (FPM / EDO, SDRAM, ...). There are JEDEC standards for the key slot
> encodings. So it has a purpose if the DIMMs don't fit because the key
> slots don't match. The purpose is to prevent loosage of the magic blue
> smoke.

I don't think he was talking about filing new slots to make electrically
incompatible DIMMs physically fit.  I read it as "These DIMMs will work
fine, but tend to have tolerance problems on the key slots."  I've run
into similar problems myself -- I had an EISA video card once that
physically would not fit into an EISA slot on a particular PC server
motherboard because the card-edge connector was about 1mm oversize.  I
looked to see where the contacts lined up, very carefully filed about
0.25mm from one end and about 0.75mm from the other, and it fit perfectly.

 Phil Stracchino
 Renaissance Man, Unix generalist, Perl hacker
 phil.stracchino at speakeasy.net
 phil.stracchino at ceva-dsp.com
 Mobile: 408-592-8081

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