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thinkpad-bios-software-flashing-guide
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added a note about having spi programmer

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Evgeny Zinoviev 5 years ago
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README.md
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@ -311,6 +311,8 @@ Now you can flash coreboot (or anything else) with flashrom.
Remember to flash only `bios` region (use `--ifd -i bios -N`). `fd` and `me` are still locked. Remember to flash only `bios` region (use `--ifd -i bios -N`). `fd` and `me` are still locked.
**Note:** if you're flashing coreboot for the first time, you should have an external SPI programmer just in case. It will help you recover if you flash non-working ROM.
# SandyBridge series (X220, T420, etc.): WIP # SandyBridge series (X220, T420, etc.): WIP
S3 Boot Scripts are unprotected on these models too (even on the most recent BIOS versions), but it's not useful, because FLOCKDN and SPI protected ranges are set by **LenovoFlashProtectPei** UEFI module. It is trivial to patch it, but it resides in protected range, so it can only be flashed externally. S3 Boot Scripts are unprotected on these models too (even on the most recent BIOS versions), but it's not useful, because FLOCKDN and SPI protected ranges are set by **LenovoFlashProtectPei** UEFI module. It is trivial to patch it, but it resides in protected range, so it can only be flashed externally.

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