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| author | Francis Rowe <info@gluglug.org.uk> | 2014-12-15 16:06:16 (EST) |
|---|---|---|
| committer | Francis Rowe <info@gluglug.org.uk> | 2014-12-15 16:06:16 (EST) |
| commit | a45044d27bb0639309c040e4881b2e84d04c409f (patch) | |
| tree | 99592121b1f14f909d0c48ade45e576116d55749 | |
| parent | 2c1ed48b05aac942eea647be0e55aed687d8608c (diff) | |
| download | libreboot-a45044d27bb0639309c040e4881b2e84d04c409f.zip libreboot-a45044d27bb0639309c040e4881b2e84d04c409f.tar.gz libreboot-a45044d27bb0639309c040e4881b2e84d04c409f.tar.bz2 | |
docs/hcl/x200_remove_me.html: info about GBe checksum calculation
| -rw-r--r-- | docs/hcl/x200_remove_me.html | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/hcl/x200_remove_me.html b/docs/hcl/x200_remove_me.html index 463fd06..b1a88e2 100644 --- a/docs/hcl/x200_remove_me.html +++ b/docs/hcl/x200_remove_me.html @@ -276,6 +276,15 @@ DD CC 18 00 11 20 17 00 DD DD 18 00 12 20 17 00 was found to be 0x34BA; again, it should be 0xBABA. 34BA is actually BABA in L33T speak (look it up). </p> <p>In honour of the song <i>Baba O'Reilly</i> by <i>The Who</i> apparently. We're not making this stuff up...</p> + + <p> + Look at resources/utilities/ich9deblob/ich9deblob.c. + </p> + <ul> + <li>Add the first 0x3F 16bit numbers (unsigned) of the GBe descriptor together (this includes the checksum value) + and that has to add up to 0xBABA. In other words, the checksum is 0xBABA minus the total of the first + 0x3E 16bit numbers (unsigned), ignoring any overflow.</li> + </ul> </div> |