about us abit users and our checksum fixing.

ive figured out the math behind it, its rather simple actually.

#1 there are numbers and letters in order from least to greatest is 0-9 then A-F (representing 10, 11, 12, 13, 14, 15) then it loops back to 0

#2 when this numbering system is taken into account you can compare the checksums to see what the difference (#) between a modified and unmodified bios checkums... i.e. (just did this 1 in 1 try) unmodified bios is 0xD200 and the modified bios is 0xD1D1.. thus the checksum numbers are ordered as follows... 0xD200 > 0xD1D1.

so to find the difference between them (an actual numerical value) you can count/calculate it. for example the difference between 0xD1D1 and 0xD1D2 = +1, 0xD1D3= +2... 0xD1DF= +14... 0xD1E0= +15... 0xD200 = 47.

so the numerical difference between 0xD1D1 and 0xD200 is 47

47 converted to hex is 2F

so what do we do? we insert the calculated checksum difference in hex (2F) in 2 00's in the no power cord message to get matching checksums.

finally, no more guesswork!