[SPARCbook] re: memory upgrade

[Jonathan Eisch]

I recall reading somewhere that the MicroSPARC 2 processors only support
up to 32mb simms, and the 64mb simms that Tadpole sells appear to be two
(virtual-) simms to the computer.  So two 64mb simms look like 4 32mb
simms, and everything works.  I'm not 100% on that but I'm pretty sure.

-Jonathan

patl at phoenix.volant.org wrote:
> 
> On 12-Sep-99 at 17:32, David Hansen (dhansen at salug.org) wrote:
> >
> >  contacting tadpole themselves will also give you even more detailed
> > information. currently no one, not even tadpole, knows of a resource for
> > getting 64MB chips that will work in the sparcbooks. and tadpole sells
> > them for just under $2,000 (U.S.).
> >  as for the other sized chips, they (tadpole) advise that the chips be
> > gold-plated and, if at all possible, use a mainstream manufacturer. (as
> > well as all of the other specifications (parity, low profile 72 pin dram,
> > 60ns.)) Anything else and you may see odd and quirky results.
> 
> Is there any definitive word on what makes these 64MB SIMMS so
> special?  Is it just the physical size constraints, or are there
> something unusual about their power requirements or signal timings
> or something?
> 
> -Pat
> 
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