[weblacky]

Hi Weblacky,

if you use L1: "debug 0x10f" then this will give you "manufacturing level diagnostic" which includes RAM testing and cache testing results.

If you want see the more complete diagnostics but not stop at PoD mode and continue to try to boot OS then use "debug 0x107"

Given where you are at I expect the 0x107 will be valuable to you,

I have tried both of these settings and they work as expected (so no danger to Fuel).

See my "dig switch calculator" here:https://just.graphica.com.au/tips/sgi-o350-chimera-notes/

This provide way to see the debug settings function and values.

Total aside on boot I can see that my Fuel prom is now 6.211, so not sure exactly when it got updated...

Cheers from Oz,

jwhat/John.

Hi Jwhat,
As I mentioned, NO PROM (Graphics or Serial) OUTPUT IS OBSERVED NONE, ZERO, ZIP on this mainboard I'm working on. Fans run, solid red front LEDs ... ,so debug command or whatever...DOES NOTHING for me, I don't get a booting PROM output or command prompt, I don't get garbled text...NOTHING.  So when I asked about the front LEDs...I was being extremely serious.

What pattern did the front panel glow when you have a CPU mismatch was a real question because I need to know if it signals a "mainboard failure" for this condition...but it's not documented.  I assumed (based on Fuel manual) it was a "System board failure (failed to read prom at power on)" based on SOLID RED LEDs...but maybe that's two statements assuming you had a working CPU to begin with and then "stuff happens".  So I went after the PROM under the assumption it's corrupted...it's not, based on my prior post.

If it's something else, I'm screwed.  I have no idea what the board issue is here due to the fact that firmware diff was 100% overlap (no different regions, no corruptions)..  So the "corrupt PROM" idea is OUT.  I'm out of ideas if this wasn't a simple mismatched CPU with just "I cannot find the PROM console output...and so what".  So I'm going to try a Firmware transplant for a 500Mhz PIMM and see if it boots...when I fix this other mainboard...hopefully.  If it boots then it's a case of, mismatched CPU and no PROM serial output was found...I'm finding PROM serial output isn't always gettable...I have two boards doing this issues, when I switch in L1 internal header command to PROM output...no PROM output comes out.