(IIRC the Sun keyboards and rodents use RS232 at TTL
level.)
YRC, basically. Sun keyboard and mouse interfaces are standard serial
(1200 baud, unless you've hacked the hardware - which is easy, and
useful, to do for some mice) except that the voltage levels are TTL
instead of RS-232, and the mechanical interface is not standard RD-232.
Exactly what it *is* depends on the device and its age - recently,
everything is miniDNI-8, at least as far as Sun used Sun-specific
interfaces, but for type-3 I've seen DA-15 as the host interface and
the mouse plugging into the keyboard with a connector whose proper name
I do not know - it's a four-conductor version of the RJ-11
six-conductor or RJ-45 eight-conductor plug, mechanically compatible
with the canonical telephone handset connector. For even older
(type-2), I've seen keyboard and mouse each plugging into a small
adapter box which has a DA-15 on it; I forget what connector the
keyboard and mouse used to plug into the adapter box.
This implies that it's possible to use a Sun keyboard or mouse on a
normal serial port, by adding a power supply and level-shifting glue
logic and doing the rest in software. I've never tried this with a
mouse, but I've tried it with a keyboard, and it worked fine. I would
not hesitate to try it with a mouse - and not just because I have lots
of spare Sun mice. :)
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