[rescue] sun 3/60 update

[Kenneth Seefried]

On Wed, May 28, 2025 at 12:00 PM <rescue-request at sunhelp.org> wrote:

>
> The ICM7170, Am7990 (lance), AM7992, Z8530 I don't see a way to
> replace (unless by re-implementing in programmable logic, or having a
> go at recreating them with open-source EDA & PDK perhaps as FOSH, but
> that's not happening anytime soon).
>

Depending on how far you want to stray from the original, would one of the
Am7990 descendents be a possibility?  Not the PCI stuff, but something like
the AM79c96x line are electrically different-but-not-terrible than the
7990, and have the bonus of having (some) software compatibility.  I'm not
sure the 96x chips are any easier to source than 7990/79c90s tho.

Similarly, for the Z8530, perhaps the Z85230/Z85233.  The latter seems to
be available (non-stocked) from Mouser.

Awesome work, BTW.
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