18
NeW zEaLaNd 🙄 (programming.dev)

you are viewing a single comment's thread
view the rest of the comments
[-] A_norny_mousse@feddit.org 17 points 3 days ago

That's one way "nz flag in z80" makes sense to me. What else could it mean?

[-] Malgas@beehaw.org 3 points 2 days 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.

[-] tiramichu@sh.itjust.works 11 points 3 days 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

[-] A_norny_mousse@feddit.org 3 points 3 days ago
[-] bobo1900@startrek.website 10 points 3 days 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

[-] zstg@programming.dev 2 points 3 days ago

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

[-] XTL@sopuli.xyz 1 points 3 days ago

http://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.

https://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.

https://tutorials.eeems.ca/Z80ASM/app1c.htm

this post was submitted on 26 Nov 2025
18 points (87.5% liked)

Aneurysm Posting

3127 readers
2 users here now

For shitposting by people who can smell burnt toast.

Rules:

  1. Nothing promoting crypto, blockchain or NFTs.
  2. Nothing right wing.
  3. Nothing anti science.
  4. No tankie support.
  5. No TERFS.
  6. No porn.
  7. Must tag AI posts as such.

founded 2 years ago
MODERATORS