addition of two BCD number with carry wAp
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.......
(HL) =3629 (DE) =4738
****************************************************************** ====>>>>> 29 + 38 = 61 and auxiliary carry flag = 1 :.add 06
============================================
61 + 06 = 67 36 + 47 + 0 (carry of LSB) = 7D
Lower nibble of addition is greater than 9, so add 6.
7D + 06 = 83
Result = 8367
.......
(HL) =3629 (DE) =4738
****************************************************************** ====>>>>> 29 + 38 = 61 and auxiliary carry flag = 1 :.add 06
============================================
61 + 06 = 67 36 + 47 + 0 (carry of LSB) = 7D
Lower nibble of addition is greater than 9, so add 6.
7D + 06 = 83
Result = 8367
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