[rescue] Sun 3/50 Schematics

[Todd Vernon]

Hello,

Background:

I recently got a Sun 3/50 that seems to boot into the ROM check fine which
I can witness via Serial Port A.  All attempts to interact via the keyboard
fail.  I have a Null Modem cable I use with all my Sun Sparc boxes and
after using breakouts and other alternate schemes Im quite sure that
something in the port A input processing isn’t working.  If I fill the
keyboard buffer on boot I can occasionally get the test menu to come up so
something is getting through once in a while.

Request:

I’ve had other machines in my collection where the some of 7400 logic got
shocked with a static charge and it’s relatively easy to debug and fix if
you have the schematics.  I can’t seem to find 3/50 schematics out there.
If anyone has them It would be super helpful!

Thanks!

-t


Todd Vernon
Entrepreneur | Investor
Email: todd at toddvernon.com
LinkedIn: toddvernon <https://www.linkedin.com/in/toddvernon/>
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