Flags Practice
Last updated
Last updated
When we have two 8-bit numbers in a calculation, and the result is more than 8 bits (9 for example) than the carry flag is 1 If we have two 16-bit numbers in a calculation, and the result is more than 16 bits (17) than the carry flag is 1
When the result is 0, zero flag is 1
If the result in a calculation has the MSB (most significant bit) 1, than the sign flag is 1. If we have a carry flag up, a bigger result than 8-bit, the carry flag does not determine the sign flag, the sign flag is 1 only if the msb of the 8-bit is 1.
This flag is up if in a calculation, the MSB of the first number is different than the result MSB.
If the number of 1s in the result is paired (2, 4, 6, 8) the flag is up If we have 16-bit situation, the Least significant byte is looked (last 8 bits)
