Comment on NeW zEaLaNd 🙄

A_norny_mousse@feddit.org ⁨1⁩ ⁨month⁩ ago

• tiramichu@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

  The Z80 part is right, but talking about a flag in the context of the Z80 instruction set it should be quite clear you mean a programming flag not a country flag

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  • A_norny_mousse@feddit.org ⁨1⁩ ⁨month⁩ ago

    whats nz then?

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    • bobo1900@startrek.website ⁨1⁩ ⁨month⁩ ago

      Never programmed on the z80, but a common flag in cpus is Zero or Not Zero (nz), that would be set when the result of an operation is not zero (or zero, depends on the architecture)

      For example A = 0 (A being a generic register) would set Z to 1 and NZ to 0, and viceversa for A = 1

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      • zstg@programming.dev ⁨1⁩ ⁨month⁩ ago

        I believe it is nonzero (“jump if not zero” iirc)

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    • XTL@sopuli.xyz ⁨1⁩ ⁨month⁩ ago

      www.z80.info/z80sflag.htm

      There’s no NZ flag. There’s the regular Z flag like in most processors. NZ is the condition of zero not being set.

      en.wikipedia.org/wiki/Zero_flag

      It’s probably a typo in the question or an actual question by human after seeing something like a JNZ instruction.

      tutorials.eeems.ca/Z80ASM/app1c.htm

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• Malgas@beehaw.org ⁨1⁩ ⁨month⁩ ago

  I don’t know the z80 specifically, but it’s probably an assembly keyword for a special bit (“flag”) that indicates if the result of the previous operation was nonzero.

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