From a45044d27bb0639309c040e4881b2e84d04c409f Mon Sep 17 00:00:00 2001
From: Francis Rowe <info@gluglug.org.uk>
Date: Mon, 15 Dec 2014 21:06:16 +0000
Subject: docs/hcl/x200_remove_me.html: info about GBe checksum calculation

---
 docs/hcl/x200_remove_me.html | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'docs/hcl/x200_remove_me.html')

diff --git a/docs/hcl/x200_remove_me.html b/docs/hcl/x200_remove_me.html
index 463fd06c..b1a88e2c 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>
 		
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