Advanced Embedded Systems Interview Question:

Explain me which bit of the flag register is set when output overflows to the sign bit?

Submitted by: Muhammad

☛ The 2nd bit of the flag register is set when output flows to the sign bit.
☛ This flag is also called as the overflow flag.
☛ Here the output of the signed number operation is too large to be accomodated in 7 bits.
☛ For signed numbers the MSB is used to indicate the whether the number is positive or negative.
☛ It is only used to detect errors in signed number operations.
Submitted by: Muhammad