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A half-carry flag (also known as an auxiliary flag) is a condition flag bit in the status register of many CPU families, such as the Intel 8080, Zilog Z80, the x86, [1] and the Atmel AVR series, among others.
The carry, parity, auxiliary carry (or half carry), zero and sign flags are included in many architectures (many modern (RISC) architectures do not have flags, such as carry, and even if they do use flags, then half carry is rare, since BCD math no longer common, and it even has limited support on long mode on x86-64).
The carry flag is set according to this addition, and subtract with carry computes a+not(b)+C, while subtract without carry acts as if the carry bit were set. The result is that the carry bit is set if a ≥ b , and clear if a < b .
The flags were flown at half-staff during President Richard Nixon’s inauguration for his second term on Jan. 20, 1973, due to him having lowered them earlier for the death of former President ...
Flags will be lowered to half-staff on Wednesday, May 15. Kentucky Gov. Andy Beshear's website offers flag status for such occasions. What to know.
A status register, flag register, or condition code register (CCR) is a collection of status flag bits for a processor.Examples of such registers include FLAGS register in the x86 architecture, flags in the program status word (PSW) register in the IBM System/360 architecture through z/Architecture, and the application program status register (APSR) in the ARM Cortex-A architecture.
U.S. flags have been flying at half-staff at all federal properties including the Capitol since Dec. 29, when President Joe Biden ordered the measure of respect following Carter's death for 30 ...
N Negative flag. Set to a copy of the most significant bit of an arithmetic result. V Overflow flag. Set in case of two's complement overflow. S Sign flag. Unique to AVR, this is always N⊕V, and shows the true sign of a comparison. H Half-carry flag. This is an internal carry from additions and is used to support BCD arithmetic. T Bit copy.