Implementing 8bit ALU in VHDL with unsigned numbers only. When the result of the sum is (1)00000000, 1 being the carry out, should the zero flag of the ALU be set to 1? Or the result is considered to be different from 0?
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Implementing 8bit ALU in VHDL with unsigned numbers only. When the result of the sum is (1)00000000, 1 being the carry out, should the zero flag of the ALU be set to 1? Or the result is considered to be different from 0?
(answer from regular CPU point of view… – i.e. http://z80-heaven.wikidot.com/flags-and-bit-level-instructions )
I’d expect
if (result)to chosefalsebranch after such operation. So it feels like zero flag should be set along with carry flag.