> Not long ago some people were talking about high speed serial ports
> on the sparc sbus systems.  I think the Magma boards were mentioned.

Yup.  I even made the 2+1HS Sp board I have work with only minimal
tweaks to the existing magma driver.

> I'd be willing to search for a Magma or other board if anyone has one
> working.

"It works for me."  It's capable of fairly high data rates; in theory
mine could go as high as, if I recall the formulas correctly, 2.5
megabaud.  It's capable of 113636+ baud and 119048- baud, but nothing
in between.  Both are within most equipment's tolerance of 115200,
though.

> Alternately, if anyone knows of a decent modem that supports
> 76800bps, I'd like to know about it.

Does your SS5 use the same horrid 8530s most Suns do for its serial
ports?  Then you may not want to run 76.8 on them; it'll mean several
thousand interrupts a second during input, with an interrupt latency
maximum on the order of a few hundred microseconds to avoid dropped
characters.

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