![]() ![]() bios stands for the x86 firmware or UEFI.On this platform there are 3 different sections Bios section? The intel firmware description contains section. Now we can look into the downloaded image, if it looks similiar. This means, it only written up to 0x00c2ee30 (12.2 MB). To find out, if we have a half written flash, we can try to look on the end of the flash if there are a lot of 1s (or 0xffffffff).Ġ0c2ee20 4d 50 44 54 00 01 00 00 10 00 00 00 00 00 10 00 |MPDT.|Ġ0c2ee30 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |.| Where a 0 was before (0 -> 1), you've to erase the whole block, not only the address. If you want to write a single bit with a 1 A block is usally 64 kbyte.Ī single bit on a flash chip can only be written to a 0. Why?īecause if you want to write a SPI flash, you can not just write to it like a hard drive. I used hexdump -C bios to see if the end contains a lot of 1s (or 0xffff in hex). Now I've looked on the BIOS backup we read with the raspberry pi. Great we found a firmware image with ifd (intel firmware descriptor). #XFREE IMAGESIZE SERIAL#X10DRW9.B22: Intel serial flash for PCH ROM Sound good, it's size is exact 16 MB, the same size as the bios flash. │ ├── Readme for X10 AMI BIOS-DOS+UEFI.txt Next I downloaded the supermicro bios update. # try to get some strings out of it, ensure you not only read 0xffff or 0x0000. # ensure the checksum is equal, to ensure you read real things. Sudo flashrom -p linux_spi:dev =/dev/spidev0.0,spispeed = 1000 -r bios2 Sudo flashrom -p linux_spi:dev =/dev/spidev0.0,spispeed = 1000 -r bios Pin 1 of the SPI chip is where the small hole is on the.Įnsure you Disconnect both power supplies from the mainboard. How you have to connect the SPI SOIC chip is described in.
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