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New Functionality: FPS Limiter #1

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sifferman opened this issue Jan 13, 2022 · 0 comments
Open

New Functionality: FPS Limiter #1

sifferman opened this issue Jan 13, 2022 · 0 comments

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@sifferman
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sifferman commented Jan 13, 2022 •
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There should be support for FPS limiting by integer division (60, 30, 20, 15, 12...).

Proposed Solution

  1. Add a clock to the FPGA that outputs "time since reset" to a 4 byte register in ($7000...$7fff).
  2. Add a way to read the frame rate limiter from the ROM on reset.
  3. In crt0.s, instead of always leaving the interrupt handler on _IN_VBLANK, there should be a check for if enough time has passed.
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@sifferman