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by gillianseed 4911 days ago
Yes, although back in my c64 programming days I knew the 6510 opcodes by heart, one didn't actually program by using machine code.

You used an assembler (turbo assembler, those were the days).

assembly: lda #00, sta $d021, sta $d020,

generated machine code: a9 00, 8d 21 d0, 8d 20 d0

Anyone else remember what this would do on the c64? :)