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Originally Posted by Kacperrrr
Hello, Is there any free program to CEL blacklist ?
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No not for free, you need a FDL-coding solution. Then you need to calculate which byte need to be changed.
I have this in my notes, taken from internet once
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general idea is that there is 1 bit for each CC-ID and all of them are sequential.
Each group has 8 bytes so 64 (= 8 * 8) bits total.
299 / 64 = 4.xxx so it's 5th group (as groups are counted from 1: 4 + 1 = 5).
299 - 64 * 4 (group) = 43 so it's 43rd bit in 5th group.
43 / 8 = 5.xxx so it's 5th byte (as bytes are counted from 0: 5 + 0 = 5).
43 - 5 * 8 = 3 so it's 3rd bit (as bits are also counted from 0)
3rd bit has value of 8 (= 2 ^ 3) so FF - 8 = F7.
Well, to be more precise - works when bit WAS SET ONLY. Normally you would do NOT-AND operation which works always. So initial value FF & (~8). ~8 = F7. FF & F7 = F7.
Assuming cc-id 256, how this math will work?
256 - 64 * 4 = 0
0 / 8 = 0
0 - 0 * 8 = 0
So it will be 0'th bit in byte 0 smile
0'th bit value is 2^0 = 1, so FF & (~1) = FE (assuming initial value was FF).
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