20 thoughts on “Reverse Engineering the MOS 6502 CPU [video]

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  2. kode80

    I cut my early coding teeth on the Z80 (gameboy + gameboy color) and always looked on to the 6502 but never got the chance. This was a fascinating presentation thank you!

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  3. Boris

    Great talk, great work on the good old 6502!

    I programmed the 6502 in my Apple ][ when I was young and it was a lot of fun. In these days I was able to write down machine code in hex, no need for an assembler.
    I also played around with illegal opcode at this time, but not in a serious matter.

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  4. Bryan

    It was a fascinating talk, some of it is a bit hard to grasp but you did a good job of going back and explaining things more clearly.

    Remarkable how complex CPU’s are, even earlier designs, a lot of complex design.. timing and math.

    I don’t think people realize just how amazing it is, especially considering most people have a supercomputer in their pocket (..cell phones, PDA’s, hell.. even their watches).

    Great work.
    -Bryan.

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  6. nossralf

    This was a great talk. I enjoyed it very much. Thanks.

    I got such a huge kick out of hearing what sounded like “basically you simulate all of physics” delivered deadpan with a German accent. For some reason I found that hilarious. Anyway…

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  11. Thomas Tempelmann

    Just saw the Atari Lynx mentioned in it. Still have such a unit in my drawer, and it still works. I only played a single game on it: Chip’s Challenge. And for that you _needed_ a good joystick – I couldn’t handle the Lynx’s internal control pad, so I added a DB9 (?) joystick connector to it so that I could use a proper joystick with it. I still remember the blip playing sounds it makes. BTW, later I helped porting Oxyd to the Mac+Amiga, which was kind of similar in its play. Oh, the joy of those old 8 bit games…

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  12. Andrzej

    Hi, there is any chance to make public sources (maybe on github) your perfect6502 simulator? Would be really great! Thx for great presentation, amazing stuff.

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  13. Shubham Ji

    Sir/madam,
    I had assembled before 20 years a MP-6502 microcomputer. Now I have lost OR sold it by mistake.
    Now I am uploading videos on YouTube. Would you like to see ?
    If yes, I will be happy to see you inside of youtube’s above website.
    Thanks and sorry for inconvenience (if any).

    S.JI

    Reply

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