[rescue] Sun Blade 1000

[Ethan Hawke]

Thanks everyone, good to know it's not a common problem.

I'll have to investigate further, I believe it's the RS423 drivers that 
have failed, as both ports fail simultaneously, whereas they can receive 
but can't send.

Replacing the driver will be difficult, but I may be able to piggyback a 
replacement on the old one.


Regards,
Ethan

On 23/02/2022 1:46 am, Peter Stokes wrote:
> Hi
>
> I have run through 100s of systems (SS1->U45 etc) over the last 25 years and
> cannot remember the last issue I had with serial ports, may be 1 or 2. In my
> experience they just work.
>
> Peter
> ---------------------------
> Peter Stokes
> Ashlyn Computer Services
> Mbl: 07977 532320
> ---------------------------
>
>
>
>
>> On 22 Feb 2022, at 13:58, Ethan Hawke <ehawk at ember.systems> wrote:
>>
>> Memory faults shouldn't prevent output on the serial ports (of course they
> will fail POST), but you should still get something.
>> Do you get any video output? I have had terrible luck with serial port
> failures on my machines. They appear dead only for video to kick on after the
> ~10 minute POST.
>> Has any one else experienced serial port failures? Almost all my sun4m
> machines have failed or unreliable serial ports, I have also had it on a Ultra
> 2 clone.
>> Not sure if it's only the 8530 based machines, does the U60 use the 8530
> ('ZS') or a typical 16550?
>>
>> Regards,
>> Ethan
>>
>> On 2/23/22 00:53, William Barnett-Lewis wrote:
>>> My guess is memory. When I recently attempted to upgrade the memory from
>>> 8gb to 16gb the memory speed was incorrect and that was the symptoms. If
>>> they aren't seated quite right or perhaps the contacts are dirty?
>>>
>>> Good luck.
>>>
>>> William
>>>
>>>
>>>>>> On 22 Feb 2022, at 10:48, silcreval <silvercreekvalley at yahoo.com>
>>>> wrote:
>>>>
>>> (snip)
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