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#6502assembly — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #6502assembly, aggregated by home.social.

  1. This week on the blog: ...mostly showing my work for what fed into last week's post, actually. A line-by-line comparison of four implementations of the same function on four variously related retro architectures.

    This is gonna be one of the crunchy ones that most folks will want to skip but that the folks who like it will *really* like, in my experience.

    bumbershootsoft.wordpress.com/

    #retrocomputing #z80 #6502assembly #8086assembly #intel8080

  2. I came up with some 6502 assembly tricks:
    - make N and Z flags reflect A (no side effects): AND #$FF (used in Excitebike; alternatives: ORA #0 or EOR #0)
    - make N and Z flags reflect X (no side effects*): INX & DEX (or for Y: INY & DEY)

    *If your interrupt routines don't access the value of X besides preserving it.

    #6502assembly #6502_assembly

  3. I've spent this last week sick at home with . During that time I downloaded and have been playing a few games. Now I have this crazy itch to make my own home brew NES game.

    I've been watching YouTube videos on how to program since yesterday and it seems pretty cool. What am I getting my self into?

    If anyone is curious, is a great channel putting out content on programming NES games and the 6502 processor.

    youtube.com/@NesHacker