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feat(cpu): use actual fetch regions for boundary bus snapshots

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0xrsydn 2026-10-06 15:13:40 +07:00
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docs/research/shared-fetch-samples.md
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@ -50,7 +50,8 @@ Strict instruction reads never use protected BIOS or unused-memory data fallback
## Current scope and limits
- Cold fills and cross-state local IWRAM history are now implemented in the [persistent-latch extension](iwram-bus-history.md).
- Thumb 16 MiB region crossings remain unsupported for bus snapshots.
- Mapped Thumb region crossings now use the actual fetched bus in the [boundary extension](fetch-region-boundaries.md).
- Unknown IWRAM lanes and unavailable/unsupported fetch observations remain diagnostic.
- BIOS history commits after successful BIOS instruction execution; target refills do not establish additional BIOS history.
- All unused-memory data reads within an instruction still use its entry snapshot.
- DMA remains scheduled between whole instructions. Sampling does not add an interleaving point.