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Tagged with cpu-flag-bits history
2 questions
6
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1
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Which CPU was the first to clear the carry and overflow bits after performing logical operations?
As I work on implementing support for old architectures for the Reko decompiler (https://github.com/uxmal/reko) I notice over and over how consistently most 1980's CPUs echo a pattern.
Since an ...
- 565
7
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1
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What CPU architecture was first to implement 'inverted borrow' carry flag during subtractions?
Background
In two's complement arithmetics, if one wants to calculate a subtraction having only an adder that calculates
{cout,result}=full_adder(arg1,arg2,cin),
where cin and cout are incoming and ...
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