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this post was submitted on 25 Aug 2025
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There's a nice 6502 assembly intro + Sim here :
https://skilldrick.github.io/easy6502/
Added edit: I mean, it's not PET-specific, but it's cool to have a little sim with a little chunk of display memory to play with.
Also you'll quickly find that assembly is extremely verbose. Learn how to load registers and jump to (and return from) subroutines as quick as you can to prevent endless amounts of repetitive assembly.