From 5c9c33854efe9285a79d510a90181b5c8eeb4864 Mon Sep 17 00:00:00 2001 From: Sebastian 'Swift Geek' Grzywna Date: Sun, 27 May 2018 12:20:52 +0200 Subject: Clarify image verification --- docs/install/x200_external.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'docs/install') diff --git a/docs/install/x200_external.md b/docs/install/x200_external.md index 3ff34501..5dd39877 100644 --- a/docs/install/x200_external.md +++ b/docs/install/x200_external.md @@ -163,7 +163,9 @@ Now compare the 3 images: # sha512sum factory*.rom -If the hashes match, then just copy one of them (the factory.rom) to a +If the hashes match and if hex editor (like `dhex`) shows that +they have valid contents (eg. it's not filled entirely with `0x00`/`0xFF`), +then just copy one of them (the factory.rom) to a safe place (on a drive connected to another system, not the BBB). This is useful for reverse engineering work, if there is a desirable behaviour in the original firmware that could be replicated in coreboot -- cgit v1.2.3-70-g09d2 From a117c5c29b4c8adc59ec9183d2f5373d41db952a Mon Sep 17 00:00:00 2001 From: Sebastian 'Swift Geek' Grzywna Date: Sun, 27 May 2018 12:22:38 +0200 Subject: Remove -V from flashrom command examples --- docs/install/x200_external.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'docs/install') diff --git a/docs/install/x200_external.md b/docs/install/x200_external.md index 5dd39877..83a5c23f 100644 --- a/docs/install/x200_external.md +++ b/docs/install/x200_external.md @@ -19,7 +19,7 @@ Flash chip size Run this command on x200 to find out flash chip model and its size: - # flashrom -p internal -V + # flashrom -p internal The X200S and X200 Tablet will use a WSON-8 flash chip, on the bottom of the motherboard (this requires removal of the motherboard). Not all X200S/X200T are @@ -180,7 +180,7 @@ address to one that is correct for your system. Now flash it: - # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -w path/to/libreboot/rom/image.rom -V + # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -w path/to/libreboot/rom/image.rom ![](images/x200/disassembly/0015.jpg) -- cgit v1.2.3-70-g09d2