"flashrom" command succeeded on reading chip containing one-time programmable memory on 3 trials, but "cmp" command says there are different bytes among the 3 output files.
Apologize for my repost as I found that I had my previous email sent without subscribing first to the mailing list so I failed to receive the reply in my inbox.
Hello awokd, can you please reply again here so I can reply to it? Sorry for the nuisance.
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Hello Flashrom team,
As captioned. I read the flashrom man page and understand that one-time programmable memory may be out of scope of flashrom and hence the failure on my chip readings.
My goal is to make a backup of the chip before I put my motherboard into production and connect it to the internet. If my motherboard is hacked and content within the chip changed, I can easily roll back the chip to a known trustable state by flashing the backed up image back into the chip.
Can you please advise how I can achieve my goal? Should I go purchase a hardware flash programmer and mess with it (I don't have any electronic knowledge)? I searched the net and found "Bus Pirate", am I correct to say that it is a programmer/debugger that can talk "directly" to the chip? Would this possibly help in my case?
Motherboard : ASRock X300M-STX CPU : AMD Ryzen 5600G BIOS chip : Winbond W25Q128.w "AMD fTPM switch" within BIOS: Disabled Programmer used : CH341a /w USB interface
Thank you for your time considering my questions. I hope you will have a good day. Alan
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Alan Mok