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feat(timing): implement nominal Game Pak opcode prefetch

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0xrsydn 2026-10-06 20:32:54 +07:00
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docs/research/refill-fetch-timing.md
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@ -117,6 +117,7 @@ The stopped counter therefore increases by five even though the final machine-cy
- Cold current/decode fills have no separate startup timing charge.
- BIOS retained history is not a complete refill/data-access bus latch.
- Missing instruction bytes remain diagnostics, not hardware prefetch aborts.
- Game Pak prefetch, per-access device updates, display contention, configurable EWRAM timing, and sub-instruction DMA arbitration remain unimplemented.
- Per-access device updates, display contention, configurable EWRAM timing, and sub-instruction DMA arbitration remain unimplemented.
- The later [nominal prefetch queue](gamepak-prefetch.md) can change source and target costs when bit 14 is enabled.
The next timing work is Game Pak prefetch with verified startup and invalidation rules.
Game Pak prefetch followed this baseline; independent startup and invalidation timing validation remains necessary.