[rescue] Replacement NVRAM/clock for Ultra 1E, success

Peter Stokes peter at ashlyn.co.uk
Sat Oct 3 11:36:13 CDT 2015

Hi Romain

Why not just buy the MT48T59Y chips which are easily available?


> On 3 Oct 2015, at 10:48, Romain Dolbeau <romain at dolbeau.org> wrote:
> Hello,
> If anyone is looking for a replacement NVRAM for a sun4u (in my case, a
> Ulra 1 200E Creator), I can confirm a working replacement is the
> M48T58Y-70PC1 that I recently bought from mouser (sorry, french site):
> <www.mouser.fr/Search/ProductDetail.aspx?R=M48T58Y-70PC1>
> They are a bit expensive but they work as a replacement for the M48T59, as
> suggested previously on this list (<
> http://www.sunhelp.org/pipermail/rescue/2013-July/133978.html>). As far as
> I can tell, it posts fine and does everything it is supposed to. I can even
> stop the clock as per the instructions in the FAQ modified for the sun4u
> (using virtual addresses, pgmap? doesn't exist), so the battery might last
> a bit longer.
> Cordially,
> -- 
> Romain Dolbeau
> _______________________________________________
> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue

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