[rescue] Ultrasparc IIe and IIe+ (IIi?) intechangeable?

[Dan Moisa]

Experiment says....

It works. They are totally interchangeable. I have yet to run heavy burn-in
tests, that comes next. It still reports as IIe from ob, but correctly
reports the 512kb cache and new frequency.

Dan.

On Fri, Jan 10, 2025 at 7:55 PM Ethan Hawke via rescue <rescue at sunhelp.org>
wrote:

> Hi Dan,
>
> Interesting question, the IIe+ is pin compatible with the IIe, it's
> changes are the following:
>      - Higher clock frequency (up to 650MHz)
>      - Additional Energy Star Ratios (1/4 and 1/8 in addition to the
> original 1/2 and 1/6)
>      - Doubled L2 Cache to 512KB
>      - Doubled memory support up to 4GB
>
> The Sun Blade 100 and 150 also run the same firmware.
>
> However the additional memory line will need to be routed for 4GB
> support, so 4GB may not be possible in the SB100 even with a IIe+.
>
> Generally Sun used external programmable PLL clock chips that load a
> safe low speed and are updated during POST, it should be possible to run
> at 650Mhz, but I can't guarantee.
>
> And of course Sun may also detect the CPU replacement and disable it in
> firmware to prevent "cheap" upgrades.
>
> In summary, I can't see how it could damage an SB100, but it may not
> work at all or some features may be ignored.
>
> Only one way to find out!
>
> Cheers,
> Ethan
>
> On 11/1/25 14:12, Dan Moisa via rescue wrote:
> > Basically moving the UltraSparc IIi (550 or 650 MHz and 512 kB of L3
> > cache) from the Sun Blade 150 into the Sun Bade 100 that has the
> > UltraSparc IIe (500 Mhz and 256 kB of L3 cache).
> >
> > Some rando claims that yes, this is possible:
> >
> https://community.unix.com/t/are-ultrasparc-iie-and-ultrasparciii-interchangeable/379996/4
> > but of course the evidence no longer exists.
> >
> > What do you think?
> >
> > Thanks,
> > Dan
> >
> > _______________________________________________
> > rescue list - http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org
>
> _______________________________________________
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>
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