[rescue] Trying to get Cadmus 9200 running (serial console trouble)

Dave McGuire mcguire at neurotica.com
Wed Feb 6 01:53:44 CST 2019

On 2/6/19 2:31 AM, Meelis Roos wrote:
>> Is the garbage consistent?B  That is, if you type (say) x, do you always
>> get the same garbage back?B  (It's not clear whether your "different for
>> each character" means "differs from one typed character code to a
>> different code" or "differs from one instance of a given character to
>> another instance of the same character".)
> I retried it. it's less consistent than I remembered.
> Aaa at a@aa at aa@aaaaaaAaA at AAaAa@aAcssssbscsbbsbbsbssbd``DD at d@`@d`d at d@ddD at D@`@`dDDDddfDfDDfDdDfffDf
> ``qqqqqqqqqaaq`qqqqa`a`aqqqqq`qaq`qvwwwwwvwwwwwgwvwwwvwwwwwADeDe at eAe@eDDaDdaeEeaeaDae`eDED
> that's
> aaaaaaaa....sssssssss.....dddddddd...
> qqqq.....wwwww....eeeeeeeeeeee...

  Hmmm.  Is it possible that it's a differential serial line, like RS423
or similar?  If that's the case, if the other line of the differential
pair isn't grounded, I've seen exactly this sort of behavior.


Dave McGuire, AK4HZ
New Kensington, PA

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