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Key questions to consider based on page 10 of this document:

http://archive.6502.org/datasheets/rockwell_r650x_r651x.pdf

  • What does page 10 imply by "Add 1 to N if page boundary is crossed"?
  • What does page 10 imply "Add 1 to N if branch occurs on the same page?"
  • What does it mean by add 2 to N if branch occurs to different page?
  • Does read and write to other devices ie.RAM cause any irregularities in clock cycles?
  • Are there any other factors that could affect clock cycles on the 6502 (more specifically the NES) ?
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  • \$\begingroup\$ This looks like a question for the hardware experts at the Electrical Engineering StackExchange. No game developer I know works with this chip in their day to day work anymore, so you might find we're not the ones with the information you need. \$\endgroup\$
    – DMGregory ♦
    Dec 8, 2019 at 16:09
  • \$\begingroup\$ @DMGregory, this is the chip used to emulate the NES. Which i would argue is the most common game emulator ever made \$\endgroup\$
    – anon0
    Dec 8, 2019 at 17:18
  • \$\begingroup\$ I'm aware. And if this were the 1980s, you might find your average game developer has experience with the cycle level details of that chip. We are, however, 30-40 years later, and modern game development does not generally make use of such chips. \$\endgroup\$
    – DMGregory ♦
    Dec 8, 2019 at 17:22

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