Thanks for a quick response!
you will always see something on the console.
That explains a lot. At the very least, now I can look around for some ECC modules and try those to tell what worked and what didn’t.
Here is an example of a module which didn’t work: Fail boot using both Flash and recovery SD
Great, so I can expect “something” to be readable and provide some info.
These are all set out in the original designs uploaded to JEDEC, so there is no reason to mess with them!
Oh, that’s quite an unusual RAM stick, then.
All the issues I have seen have been related to incorrect SPD data, either incorrect DQ mappings or even modules claiming to be entirely different physical designs!
I presume I may have luck with more well-known brands, so I’ll look for those. Thanks.
This process runs over JTAG, AFAIK it basically tries each possible setting combination (with some ‘educated guessing’ derived from the physical trace lengths we give it) and sees which ones operate successfully.
Noted. I guess setting that up may be a quite expensive. 