[rescue] What to do with the SS20

Sandwich Maker adh at an.bradford.ma.us
Mon Jun 23 06:49:54 CDT 2014

" From: "r.stricklin" <bear at typewritten.org>
" On Jun 22, 2014, at 5:37 PM, Sandwich Maker wrote:
" > " Sun introduced multiprocessor support in SunOS 4.1.2, IIRC, partly in
" > " response to Solbourne (IMHO). The SPARCserver 600MP models were out and
" > " 4.1.2 supported them well before the first harrowingly unstable Solaris
" > " 2 release, so I don't think the MP support was a secret.
" >
" > yes, but it didn't run on ss20s or ross cpus.  i'm curious if it runs
" > on the sparc powerup enhanced sun4c, or only proper sun-branded cpus.

clarification: 4.1.2 certainly did run on ss10s and ss20s, but i
recall sun saying you needed solaris 2 to get mp.  really true or just
marketing fud?  or foggy memory?

" In fact, it was intended to run on the SM100 modules, which were dual Cypress
" (Ross) RT601s. This module is the only official way to do MP with SunOS 4
" AFAIR. You could put two in an 600MP (or SS10, or SS20 even) to get four
" processors, but the SM100 is so wet that it is a bit like winning twenty cents
" in the lottery.

ah yes...  the 600 came out before the supersparc, right?

" The 40 MHz RT601 on the SM100 is the same CPU as used in an SS2, but QFP
" packaged instead of PGA. So, you can't put a PowerUP on an SM100.

another fine idea shot down by facts...	:^/

" Perhaps you meant 4.1 didn't support MP with HyperSPARC or SuperSPARC? That
" would be correct.

i certainly didn't expect hypersparcs - before 4.1.4 anyway - but
didn't they put supersparcs into 600mps?  i know ross had hyper
modules for them.
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought

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