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feat(cpu): account for source fetches in branch and IRQ refills

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0xrsydn 2026-10-06 16:27:45 +07:00
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docs/research/fetch-region-boundaries.md
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@ -77,7 +77,8 @@ A retry takes a new lookahead sample from current memory.
- All data reads within an instruction still use one entry snapshot.
The later [fetch-address timing extension](fetch-address-timing.md) charges non-refill code at the actual lookahead address.
Refill summaries remain destination-based; the instruction-local access kinds and cold-start costs are still nominal.
The [refill timing extension](refill-fetch-timing.md) also charges source fetches and target pairs individually.
Instruction-local access kinds and cold-start costs remain nominal.
Per-access device updates, video-bus contention, general DMA handoff, and Game Pak prefetch remain incomplete.
No boundary timing accuracy is claimed.