SS10 console settings

[Jerry Kemp]

+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
>