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

[Dave McGuire]

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

-- 
Dave McGuire, AK4HZ
New Kensington, PA