Borrow and Carry Bit for Subtraction

Similar to the usage of the carry bit when adding there are mechanisms for subtracting that allow to integrate the result of subtraction of the lower bits into the subtraction of the next higher block of bits, where necessary. There are two ways to do this, that are trivially equivalent by a simple not operation: …

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Carry Bit: How does it work?

Deutsch Most of us know from elementary school how to add multi-digit numbers on paper. Usage of the carry bit is the same concept, but not for base 10, not even for base 2, but for base 256 (in the old 8-bit-days), base 65536 (in the almost as old 16-bit-days), base 4294967296 (32 bit) or …

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