🚀 go-pugleaf

Steven Hirsch <snhirsch@gmail.com> writes:

>davidsworkstation@gmail.com wrote:
>> Hello Everyone,
>> 
>> I am in the process of trying to upgrade my Sparc 20 with dual 150MHz
>> Ross Hypersparc CPUs. I tested the machine first with the standard
>> equipment it already had and everything works fine. Then I set the
>> Diag-switch to false, and powered down the machine. Then I removed the
>> old bios or boot prom chip, and upgraded it with the one that came
>> with the new processor, and then installed only one of the Processors
>> to make sure that it would take. Now the Sparc 20 will power up, but
>> even after running for 30 minutes or so, it will not post. I have
>> tried swapping the memory, running it without a disk, trying another
>> cpu, trying the original CPU, swapping the NVRAM, trying another bios
>> chip in case that one was faulty and still nothing. Then, when I try
>> to put everything back to the orignal configuration, I get nothing.
>> Any ideas?

>I've found the Hypersparc 'R' version of the firmware can take a very long 
>time to POST, but 30 minutes is over the top.  First suspect: a flaky power 
>supply.  The Ross chips pull more current and may have pushed something that 
>was marginal over the edge.

The longest it should take to run the power-up self-tests, even in diag
mode, would be around 5 minutes. It would vary depending what CPU's are
installed, etc. but the best way to check what's happening is to connect a
device acting as a serial console (such as another Sun system with 'tip'
running over the serial port) and look at all the diagnostic messages that
way.

Regards,

Craig.

-- 
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