[HECnet] SC-40

[Johnny Billquist]

On 2015-02-12 19:23, Cory Smelosky wrote:
None of the pins on the connector are ground. That'd explain some things.

I just want to check here, how you asserted that? The signal ground is not the same as chassis ground, so I hope you didn't just measure against some random point on a chassis, or some random pin on a DB25...

	Johnny


Sent from my iPhone

On Feb 12, 2015, at 13:22, Peter Lothberg <roll at Stupi.SE> wrote:

Straight gives me gibberish, null gives me output. I'll find my straight.
  FWIW, if the SC40 is wired like a "real" DEC computer, then a null modem
cable would be required between the console DB25 and a VTxxx.

If the wiring (ground) was even close to correct, either crossed or non
crossed should give NO characters.   -:)

--P