Added setting checksum explanation
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2489 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/TECH b/docs/TECH
index 523a362..00abf88 100644
--- a/docs/TECH
+++ b/docs/TECH
@@ -105,6 +105,12 @@
realize, as if you change a config setting and then immediately shuts your
unit down, the new config is not saved.
+ DEVELOPERS:
+ The config checksum includes a header with a version number. This version
+ number must be increased when the config structure becomes incompatible.
+ This makes the checksum check fail, and the settings are reset to default
+ values.
+
Resume Explained
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