[rescue] SPARCstation 1 boot woes

[Mouse]

>> [...] from which I perform the masterful deduction that the band
>> marks the + end. :-)

> ;)

> That is (was) a tantalum capacitor.  On those, the band marks the
> positive end as you found.  It is also sometimes beveled.

Now that I know to look for it, yes, I see a bevel on the banded end of
similar caps elsewhere on the board, and on C10112 on the non-exploded
board.

I've now cleared the remnants of the exploded cap and soldered in an
ordinary 35V 33µF electrolytic from my stock.  It probably doesn't have
quite as good high-frequency response as the original, but it seems to
be good enough - the board now comes up and passes selftest.  I've got
two 4M sticks of 36-bit RAM and a 16M stick of 33-bit RAM in there and
it seems to be happy (in 33-bit mode - I haven't found more 36-bit RAM)
so far; I'm waiting for a NetBSD kernel to load diskless right now.

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