I Worked on this with some other guys on delcohacking thought id post it up here seeing your right into all the cluster stuff. We got it working all good.
Here's how to work it.
KM YOU WANT
1337km
ADD CHECKSUMS
00FF 13EC 37C8
FIND LINE CHECKSUM
00+13+37=4A ^ FF = B5
B54A 00FF 13EC 37C8
CONVERT USING NIBBLES FROM BINARY
B54A = DA25
00FF = 00FF
13EC = 8C73
37C8 = CE31
CONVERT FROM MSB TO LSB
DA25 = 52AD
00FF = FF00
8C73 = 37C8
CE31 = 13EC
BINARY TABLE CODED INTO NIBBLES LOOKUP FOR SECOND LAST TABLE CONVERTION
0=0,1=8,2=4,3=c,4=2,5=a,6=6,7=e,8=1,9=9,a=5,b=d,c=3,d=b,e=7,f=f
GM Technical Document Discussion
VS Commodore Cluster Reprogramming
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To gain access to the Invite Only forum you must be invited by a member of that forum. That member will PM the mods or admins (NOT you) saying that they nominate you for access. THEY will be responsible for your actions. If you don't post and just leech info, you will BOTH be removed. Dont send a PM to the moderators or admins asking for access, you really dont want to see the result. If you submit information, you may simply be invited
11 posts
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by ZerOne » Sun Sep 04, 2011 5:35 pm
Bwahaha... Lol at the Kms 1337 !!!!!!
Thankyou for the information !
It is seriously appreciated !
I have a lot of respect for you guys at http://www.delcohacking.net
Fantastic bunch of highly intelligent guys.
I am a registered user there, but I havent been on for some time, as I have had very little to contribute.
I will definitely have to revisit the forums now that I know a little more about this kind of stuff...
Cheers
Matti
Thankyou for the information !
It is seriously appreciated !
I have a lot of respect for you guys at http://www.delcohacking.net
Fantastic bunch of highly intelligent guys.
I am a registered user there, but I havent been on for some time, as I have had very little to contribute.
I will definitely have to revisit the forums now that I know a little more about this kind of stuff...
Cheers
Matti
by TazzI » Tue Jan 10, 2012 2:32 pm
If either of you get anytime, could you explain in simpler terms what is occurring in each step?
I googled a few terms like checksum but still don't get what its purpose is?
I googled a few terms like checksum but still don't get what its purpose is?
by ZerOne » Tue Jan 10, 2012 5:02 pm
A checksum is a way of determining if the data is correct. (I.E. has not been corrupted).
It usually is some agreed mathematic formula, rounded down so as the checksum value is very small.
Eg. This number 1234
One simple checksum example would be to add each number together, then divide the number by the number of digits (4))
Mathematically this would be
1+2+3+4 = 10
Then divide this by the number of digits
10 / 4 = 2.5
Then you would round this digit up or down..
2.5 is roughly equal to 3
So using the above example, the checksum would be 3
So if you and I agreed on the above checksum method, and I sent you some numbers scrawled on a bit of toilet paper,
you would know if the numbers were correct by using the above formula, and checking the checksum to see if that digit is correct.
---------
Another classic example of checksums are credit card numbers.
There is a mathematical formula to work out if a credit card number is real, or made up....
Hope this helps a little bit....
Note: Edited retarded maths
It usually is some agreed mathematic formula, rounded down so as the checksum value is very small.
Eg. This number 1234
One simple checksum example would be to add each number together, then divide the number by the number of digits (4))
Mathematically this would be
1+2+3+4 = 10
Then divide this by the number of digits
10 / 4 = 2.5
Then you would round this digit up or down..
2.5 is roughly equal to 3
So using the above example, the checksum would be 3
So if you and I agreed on the above checksum method, and I sent you some numbers scrawled on a bit of toilet paper,
you would know if the numbers were correct by using the above formula, and checking the checksum to see if that digit is correct.
---------
Another classic example of checksums are credit card numbers.
There is a mathematical formula to work out if a credit card number is real, or made up....
Hope this helps a little bit....
Note: Edited retarded maths
by ZerOne » Tue Jan 10, 2012 5:06 pm
This particular cluster, and its method is discussed very well on the delco hacking website.
www.delcohacking.net
A lot of the terms used above would be familiar to low level programmers (C, and Assembly), and would also be familiar to Electrical Engineers. (Boolean Algebra, etc)....
Not for the faint of heart....
www.delcohacking.net
A lot of the terms used above would be familiar to low level programmers (C, and Assembly), and would also be familiar to Electrical Engineers. (Boolean Algebra, etc)....
Not for the faint of heart....
by TazzI » Tue Jan 10, 2012 7:22 pm
Oh alright that makes sense! cheers for the explanation.
One thing though, 1+2+3+4= 10
Ud think university would mention these things, Iv studied C and matlab but I guess uni does not need to go into these sorts of ideas such as checksums, only the language itself.
One thing though, 1+2+3+4= 10
Ud think university would mention these things, Iv studied C and matlab but I guess uni does not need to go into these sorts of ideas such as checksums, only the language itself.
by TazzI » Tue Jan 24, 2012 1:54 pm
ZerOne wrote:This particular cluster, and its method is discussed very well on the delco hacking website.
http://www.delcohacking.net
A lot of the terms used above would be familiar to low level programmers (C, and Assembly), and would also be familiar to Electrical Engineers. (Boolean Algebra, etc)....
Not for the faint of heart....
Just read through that 30page document on that site, interesting they sorted how to alter from kms to miles? maybe that is what the first 8 bytes are in the VY clusters?
VY: 00 00 00 00 89 84 28 E9
VN/VT (whatever is was): 01 E8 CA A8 00 FF 20 DF
to
01 E8 CA A8 00 FF DF 20
by TazzI » Wed Jan 25, 2012 1:24 pm
Well got a bit bord and decided to learn C++and created a rough GUI for calculating the odo code for the VS.
Doesn't look specky and still has some bugs and freaks out but it works *majority* of the time.
Was thinking of making this for the VY/VZ, even though there easy to do, thought it would be nice then having to work them out manually each time.
Let me know if you reckon its a good idea.
Here's a screeny
Doesn't look specky and still has some bugs and freaks out but it works *majority* of the time.
Was thinking of making this for the VY/VZ, even though there easy to do, thought it would be nice then having to work them out manually each time.
Let me know if you reckon its a good idea.
Here's a screeny
by Michaeloptob » Sat Jul 14, 2018 4:15 pm
I drove it to work today without any of the plastic dash pieces that hold the cluster in. Cluster works fine like that. Im still hesitant to throw a cluster at it. I would love to try one for a day or too. I guess if someone had one for the right price...
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