WRT advanced 6502 programming texts, allow me plug my (free) book "EOR #$FF: 6502 Ponderables and Befuddlements". It's 64 assembly snippets to ponder, with explanations for each in the 2nd-half of the book: https://archive.org/details/eor6502
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FROM THE SHARED SHELF · 2006–2026 SAMPLE
EOR #$FF: 6502 Ponderables and Befuddlements
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