14 Jun
2015
14 Jun
'15
10:22 p.m.
+1 to Tony for heading down the right path.
The rear DB25 serial connector is an A & B serial port combined.
Sun had/sold a special Y-splitter cable to use for the combined port.
Here is pinout information from sunhelp.org in case you want to make one for
yourself from scratch.
http://www.sunhelp.org/unix-serial-port-resources/serial-pinouts/#10.lx.link
Plan B, either someone here has one they can give/sell you, or someone from the
Sun rescue list will. Or eBay, etc.
Good Luck,
Jerry
On 06/14/15 10:41 AM, tony duell wrote:
I'm trying
to resurrect a couple of Sparcstation 10 systems. Is there
anything 'funny' about the serial console settings on SS10 hardware? I
thought they always defaulted to 9600-n-8-1, but I get voluminous
gobbledygook at that, and at every other baud rate I've tried.
Both systems behave identically, so I can't assume SS10 settings are
wrong. And I *am* getting data, so I don't see how it can be the
cabling. Something strange about the terminal emulation mode required
maybe?
Did they both come from the same place? It is possible (I guess) that
parameters were changed to meet a local 'standard', and thus both
machines are configured identically, just not the normal way.
From the FAQ I've looked at, the serial port
is a DB25 with the 'A'
port on on the primary channel and the 'B'
port on the back channel.
If so, at least you've not got the classic problem of wiring up an
RS422 port and using the wrong data pin (and thus getting inverted
data, including the framing bits, which really confuses the receiver).
I don't know if it's implemented here, but the FAQ suggests that pin 24
will carry a baud rate clock. Have you tried a 'scope there? If so, what do
you see, and what frequency?
-tony