G1-ATA Devices

[SWAT]

Good job OzOnE!
For start, I think you should try to change 1 byte in the loop (in any unused space), if it does not have success, then try the word. If and second test does not have success, then probably we have to think about hardware hack (switching BIOS or something else). Otherwise we will have to understand the algorithm, but it is not easy.
I think that is algorithm is converging with algorithms of scramble and flashrom chechsum checking, in both cases used some magic number.