SS10 console settings

Jerry Kemp other at
Mon Jun 15 00:22:20 CDT 2015

+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 in case you want to make one for 
yourself from scratch.

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,


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

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