aboutsummaryrefslogtreecommitdiff
path: root/docs
diff options
context:
space:
mode:
Diffstat (limited to 'docs')
-rw-r--r--docs/install/x200_external.md4
1 files changed, 3 insertions, 1 deletions
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