I don't always make 6502(ish) errors, but when i do, it's usually the memory address instead of the immediate! It's a very common and easy mistake to make, and i believe Chuck Peddle himself deeply regretted the (number symbol, pound sign, hashtag) #$1234 syntax for immediate values. I made # appear bright red in my IDE, it helps, a bit... Even the ASM gods at Rare fell victim to the same issue!
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